Exhibit 10.2

COMMERCIAL GUARANTY

References in the boxes above are for Lender’s use only and do not limit the applicability of this document to any particular loan or item.

Any item above containing “***” has been omitted due to text length limitations.

CONTINUING GUARANTEE OF PAYMENT AND PERFORMANCE. For good and valuable consideration, Guarantor absolutely and unconditionally guarantees full and punctual payment and satisfaction of Guarantor’s Share of the Indebtedness of Borrower to Lender, and the performance and discharge of all Borrower’s obligations under the Note and the Related Documents. This is a guaranty of payment and performance and not of collection, so Lender can enforce this Guaranty against Guarantor even when Lender has not exhausted Lender’s remedies against anyone else obligated to pay the Indebtedness or against any collateral securing the Indebtedness, this Guaranty or any other guaranty of the Indebtedness. Guarantor will make any payments to Lender or its order, on demand, in legal tender of the United States of America, in same-day funds, without set-off or deduction or counterclaim, and will otherwise perform Borrower’s obligations under the Note and Related Documents. Under this Guaranty, Guarantor’s obligations are continuing.

INDEBTEDNESS. The word “Indebtedness” as used in this Guaranty means all of the principal amount outstanding from time to time and at any one or more times, accrued unpaid interest thereon and all collection costs and legal expenses related thereto permitted by law, attorneys’ fees, arising from any and all debts, liabilities and obligations of every nature or form, now existing or hereafter arising or acquired, that Borrower individually or collectively or interchangeably with others, owes or will owe Lender. “Indebtedness” includes, without limitation, loans, advances, debts, overdraft indebtedness, credit card indebtedness, lease obligations, liabilities and obligations under any interest rate protection agreements or foreign currency exchange agreements or commodity price protection agreements, other obligations, and liabilities of Borrower, and any present or future judgments against Borrower, future advances, loans or transactions that renew, extend, modify, refinance, consolidate or substitute these debts, liabilities and obligations whether: voluntarily or involuntarily incurred; due or to become due by their terms or acceleration; absolute or contingent; liquidated or unliquidated; determined or undetermined; direct or indirect; primary or secondary in nature or arising from a guaranty or surety; secured or unsecured; joint or several or joint and several; evidenced by a negotiable or non-negotiable instrument or writing; originated by Lender or another or others; barred or unenforceable against Borrower for any reason whatsoever; for any transactions that may be voidable for any reason (such as infancy, insanity, ultra vires or otherwise); and originated then reduced or extinguished and then afterwards increased or reinstated.

If Lender presently holds one or more guaranties, or hereafter receives additional guaranties from Guarantor, Lender’s rights under all guaranties shall be cumulative. This Guaranty shall not (unless specifically provided below to the contrary) affect or invalidate any such other guaranties. Guarantor’s liability will be Guarantor’s aggregate liability under the terms of this Guaranty and any such other unterminated guaranties.

GUARANTOR’S SHARE OF THE INDEBTEDNESS. The words “Guarantor’s Share of the Indebtedness” as used in this Guaranty mean an amount not to exceed Sixteen Million Five Hundred Thousand & 00/100 Dollars ($16,500,000.00) of all the principal amount, interest thereon to the extent not prohibited by law, and all collection costs, expenses and attorneys’ fees whether or not there is a lawsuit, and if there is a lawsuit, any fees and costs for trial and appeals.

Guarantor’s Share of the Indebtedness will only be reduced by sums actually paid by Guarantor under this Guaranty, but will not be reduced by sums from any other source including, but not limited to, sums realized from any collateral securing the Indebtedness or this Guaranty, or payments by anyone other than Guarantor, or reductions by operation of law, judicial order or equitable principles. Lender has the sole and absolute discretion to determine how sums shall be applied among guaranties of the Indebtedness.

The above limitation on liability is not a restriction on the amount of the Note of Borrower to Lender either in the aggregate or at any one time.

CONTINUING GUARANTY. THIS IS A “CONTINUING GUARANTY” UNDER WHICH GUARANTOR AGREES TO GUARANTEE THE FULL AND PUNCTUAL PAYMENT, PERFORMANCE AND SATISFACTION OF THE GUARANTOR’S SHARE OF THE INDEBTEDNESS OF BORROWER TO LENDER, NOW EXISTING OR HEREAFTER ARISING OR ACQUIRED, ON A CONTINUING BASIS. ACCORDINGLY, ANY PAYMENTS MADE ON THE INDEBTEDNESS WILL NOT DISCHARGE OR DIMINISH GUARANTOR’S OBLIGATIONS AND LIABILITY UNDER THIS GUARANTY FOR ANY REMAINING AND SUCCEEDING INDEBTEDNESS EVEN WHEN ALL OR PART OF THE OUTSTANDING INDEBTEDNESS MAY BE A ZERO BALANCE FROM TIME TO TIME.

DURATION OF GUARANTY. This Guaranty will take effect when received by Lender without the necessity of any acceptance by Lender, or any notice to Guarantor or to Borrower, and will continue in full force until all the Indebtedness incurred or contracted before receipt by Lender of any notice of revocation shall have been fully and finally paid and satisfied and all of Guarantor’s other obligations under this Guaranty shall have been performed in full. If Guarantor elects to revoke this Guaranty, Guarantor may only do so in writing. Guarantor’s written notice of revocation must be mailed to Lender, by certified mail, at Lender’s address listed above or such other place as Lender may designate in writing. Written revocation of this Guaranty will apply only to new Indebtedness created after actual receipt by Lender of Guarantor’s written revocation. For this purpose and without limitation, the term “new Indebtedness” does not include the Indebtedness which at the time of notice of revocation is contingent, unliquidated, undetermined or not due and which later becomes absolute, liquidated, determined or due. For this purpose and without limitation, “new Indebtedness” does not include all or part of the Indebtedness that is: incurred by Borrower prior to revocation; incurred under a commitment that became binding before revocation; any renewals,

extensions, substitutions, and modifications of the Indebtedness. This Guaranty shall bind Guarantor’s estate as to the Indebtedness created both before and after Guarantor’s death or incapacity, regardless of Lender’s actual notice of Guarantor’s death. Subject to the foregoing, Guarantor’s executor or administrator or other legal representative may terminate this Guaranty in the same manner in which Guarantor might have terminated it and with the same effect. Release of any other guarantor or termination of any other guaranty of the Indebtedness shall not affect the liability of Guarantor under this Guaranty. A revocation Lender receives from any one or more Guarantors shall not affect the liability of any remaining Guarantors under this Guaranty. It is anticipated that fluctuations may occur in the aggregate amount of the Indebtedness covered by this Guaranty, and Guarantor specifically acknowledges and agrees that reductions in the amount of the Indebtedness, even to zero dollars ($0.00), shall not constitute a termination of this Guaranty. This Guaranty is binding upon Guarantor and Guarantor’s heirs, successors and assigns so long as any of the Guarantor’s Share of the Indebtedness remains unpaid and even though the Guarantor’s Share of the Indebtedness may from time to time be zero dollars ($0.00).

GUARANTOR’S AUTHORIZATION TO LENDER. Guarantor authorizes Lender, either before or after any revocation hereof, without notice or demand and without lessening Guarantor’s liability under this Guaranty, from time to time: (A) prior to revocation as set forth above, to make one or more additional secured or unsecured loans to Borrower, to lease equipment or other goods to Borrower, or otherwise to extend additional credit to Borrower; (B) to alter, compromise, renew, extend, accelerate, or otherwise change one or more times the time for payment or other terms of the Indebtedness or any part of the Indebtedness, including increases and decreases of the rate of interest on the Indebtedness; extensions may be repeated and may be for longer than the original loan term; (C) to take and hold security for the payment of this Guaranty or the Indebtedness, and exchange, enforce, waive, subordinate, fail or decide not to perfect, and release any such security, with or without the substitution of new collateral; (D) to release, substitute, agree not to sue, or deal with any one or more of Borrower’s sureties, endorsers, or other guarantors on any terms or in any manner Lender may choose; (E) to determine how, when and what application of payments and credits shall be made on the Indebtedness; (F) to apply such security and direct the order or manner of sale thereof, including without limitation, any nonjudicial sale permitted by the terms of the controlling security agreement or deed of trust, as Lender in its discretion may determine; (G) to sell, transfer, assign or grant participations in all or any part of the Indebtedness; and (H) to assign or transfer this Guaranty in whole or in part.

GUARANTOR’S REPRESENTATIONS AND WARRANTIES. Guarantor represents and warrants to Lender that (A) no representations or agreements of any kind have been made to Guarantor which would limit or qualify in any way the terms of this Guaranty; (B) this Guaranty is executed at Borrower’s request and not at the request of Lender; (C) Guarantor has full power, right and authority to enter into this Guaranty; (D) the provisions of this Guaranty do not conflict with or result in a default under any agreement or other instrument binding upon Guarantor and do not result in a violation of any law, regulation, court decree or order applicable to Guarantor; (E) Guarantor has not and will not, without the prior written consent of Lender, sell, lease, assign, encumber, hypothecate, transfer, or otherwise dispose of all or substantially all of Guarantor’s assets, or any interest therein; (F) upon Lender’s request, Guarantor will provide to Lender financial and credit information in form acceptable to Lender, and all such financial information which currently has been, and all future financial information which will be provided to Lender is and will be true and correct in all material respects and fairly present Guarantor’s financial condition as of the dates the financial information is provided; (G) no material adverse change has occurred in Guarantor’s financial condition since the date of the most recent financial statements provided to Lender and no event has occurred which may materially adversely affect Guarantor’s financial condition; (H) no litigation, claim, investigation, administrative proceeding or similar action (including those for unpaid taxes) against Guarantor is pending or threatened; (I) Lender has made no representation to Guarantor as to the creditworthiness of Borrower; and (J) Guarantor has established adequate means of obtaining from Borrower on a continuing basis information regarding Borrower’s financial condition. Guarantor agrees to keep adequately informed from such means of any facts, events, or circumstances which might in any way affect Guarantor’s risks under this Guaranty, and Guarantor further agrees that, absent a request for information, Lender shall have no obligation to disclose to Guarantor any information or documents acquired by Lender in the course of its relationship with Borrower.

GUARANTOR’S WAIVERS. Except as prohibited by applicable law, Guarantor waives any right to require Lender to (A) make any presentment, protest, demand, or notice of any kind, including notice of change of any terms of repayment of the Indebtedness, default by Borrower or any other guarantor or surety, any action or nonaction taken by Borrower, Lender, or any other guarantor or surety of Borrower, or the creation of new or additional Indebtedness; (B) proceed against any person, including Borrower, before proceeding against Guarantor; (C) proceed against any collateral for the Indebtedness, including Borrower’s collateral, before proceeding against Guarantor; (D) apply any payments or proceeds received against the Indebtedness in any order; (E) give notice of the terms, time, and place of any sale of the collateral pursuant to the Uniform Commercial Code or any other law governing such sale; (F) disclose any information about the Indebtedness, the Borrower, the collateral, or any other guarantor or surety, or about any action or nonaction of Lender; or (G) pursue any remedy or course of action in Lender’s power whatsoever.

Guarantor also waives any and all rights or defenses arising by reason of (H) any disability or other defense of Borrower, any other guarantor or surety or any other person; (I) the cessation from any cause whatsoever, other than payment in full, of the Indebtedness; (J) the application of proceeds of the Indebtedness by Borrower for purposes other than the purposes understood and intended by Guarantor and Lender; (K) any act of omission or commission by Lender which directly or indirectly results in or contributes to the discharge of Borrower or any other guarantor or surety, or the Indebtedness, or the loss or release of any collateral by operation of law or otherwise; (L) any statute of limitations in any action under this Guaranty or on the Indebtedness; or (M) any modification or change in terms of the Indebtedness, whatsoever, including without limitation, the renewal, extension, acceleration, or other change in the time payment of the Indebtedness is due and any change in the interest rate, and including any such modification or change in terms after revocation of this Guaranty on the Indebtedness incurred prior to such revocation.

Guarantor waives all rights of subrogation, reimbursement, indemnification, and contribution and any other rights and defenses that are or may become available to Guarantor by reason of California Civil Code Sections 2787 to 2855, inclusive.

Guarantor waives all rights and any defenses arising out of an election of remedies by Lender even though that the election of remedies, such as a non-judicial foreclosure with respect to security for a guaranteed obligation, has destroyed Guarantor’s rights of subrogation and reimbursement against Borrower by operation of Section 580d of the California Code of Civil Procedure or otherwise.

Guarantor waives all rights and defenses that Guarantor may have because Borrower’s obligation is secured by real property. This means among other things: (N) Lender may collect from Guarantor without first foreclosing on any real or personal property collateral pledged by Borrower. (O) If Lender forecloses on any real property collateral pledged by Borrower: (1) the amount of Borrower’s obligation may be reduced only by the price for which the collateral is sold at the foreclosure sale, even if the collateral is worth more than the sale price. (2) Lender may collect from Guarantor even if Lender, by foreclosing on the real property collateral, has destroyed any right Guarantor may have to collect from Borrower. This is an unconditional and irrevocable waiver of any rights and defenses Guarantor may have because Borrower’s obligation is secured by real property. These rights and defenses include, but are not limited to, any rights and defenses based upon Section 580a, 580b, 580d, or 726 of the Code of Civil Procedure.

Guarantor understands and agrees that the foregoing waivers are unconditional and irrevocable waivers of substantive rights and defenses to which Guarantor might otherwise be entitled under state and federal law. The rights and defenses waived include, without limitation, those provided by California laws of suretyship and guaranty, anti-deficiency laws, and the Uniform Commercial Code. Guarantor acknowledges that Guarantor has provided these waivers of rights and defenses with the intention that they be fully relied upon by Lender. Guarantor further understands and agrees that this Guaranty is a separate and independent contract between Guarantor and Lender, given for full and ample consideration, and is enforceable on its own terms. Until all of the Indebtedness is paid in full, Guarantor waives any right to enforce any remedy Guarantor may have against the Borrower or any other guarantor, surety, or other person, and further, Guarantor waives any right to participate in any collateral for the Indebtedness now or hereafter held by Lender.

Guarantor’s Understanding With Respect To Waivers. Guarantor warrants and agrees that each of the waivers set forth above is made with Guarantor’s full knowledge of its significance and consequences and that, under the circumstances, the waivers are reasonable and not contrary to public policy or law. If any such waiver is determined to be contrary to any applicable law or public policy, such waiver shall be effective only to the extent permitted by law or public policy.

Subordination of Borrower’s Debts to Guarantor. Guarantor agrees that the Indebtedness, whether now existing or hereafter created, shall be superior to any claim that Guarantor may now have or hereafter acquire against Borrower, whether or not Borrower becomes insolvent. Guarantor hereby expressly subordinates any claim Guarantor may have against Borrower, upon any account whatsoever, to any claim that Lender may now or hereafter have against Borrower. In the event of insolvency and consequent liquidation of the assets of Borrower, through bankruptcy, by an assignment for the benefit of creditors, by voluntary liquidation, or otherwise, the assets of Borrower applicable to the payment of the claims of both Lender and Guarantor shall be paid to Lender and shall be first applied by Lender to the Indebtedness. Guarantor does hereby assign to Lender all claims which it may have or acquire against Borrower or against any assignee or trustee in bankruptcy of Borrower; provided however, that such assignment shall be effective only for the purpose of assuring to Lender full payment in legal tender of the Indebtedness. If Lender so requests, any notes or credit agreements now or hereafter evidencing any debts or obligations of Borrower to Guarantor shall be marked with a legend that the same are subject to this Guaranty and shall be delivered to Lender. Guarantor agrees, and Lender is hereby authorized, in the name of Guarantor, from time to time to file financing statements and continuation statements and to execute documents and to take such other actions as Lender deems necessary or appropriate to perfect, preserve and enforce its rights under this Guaranty.

Miscellaneous Provisions. The following miscellaneous provisions are a part of this Guaranty:

AMENDMENTS. This Guaranty, together with any Related Documents, constitutes the entire understanding and agreement of the parties as to the matters set forth in this Guaranty. No alteration of or amendment to this Guaranty shall be effective unless given in writing and signed by the party or parties sought to be charged or bound by the alteration or amendment.

ATTORNEYS’ FEES; EXPENSES. Guarantor agrees to pay upon demand all of Lender’s costs and expenses, including Lender’s attorneys’ fees and Lender’s legal expenses, incurred in connection with the enforcement of this Guaranty. Lender may hire or pay someone else to help enforce this Guaranty, and Guarantor shall pay the costs and expenses of such enforcement. Costs and expenses include Lender’s attorneys’ fees and legal expenses whether or not there is a lawsuit, including attorneys’ fees and legal expenses for bankruptcy proceedings (including efforts to modify or vacate any automatic stay or injunction), appeals, and any anticipated post-judgment collection services. Guarantor also shall pay all court costs and such additional fees as may be directed by the court.

CAPTION HEADINGS. Caption headings in this Guaranty are for convenience purposes only and are not to be used to interpret or define the provisions of this Guaranty.

GOVERNING LAW. This Guaranty will be governed by federal law applicable to Lender and, to the extent not preempted by federal law, the laws of the State of California without regard to its conflicts of law provisions.

CHOICE OF VENUE. If there is a lawsuit, Guarantor agrees upon Lender’s request to submit to the jurisdiction of the courts of Los Angeles County, State of California.

INTEGRATION. Guarantor further agrees that Guarantor has read and fully understands the terms of this Guaranty; Guarantor has had the opportunity to be advised by Guarantor’s attorney with respect to this Guaranty; the Guaranty fully reflects Guarantor’s intentions and parol evidence is not required to interpret the terms of this Guaranty. Guarantor hereby indemnifies and holds Lender harmless from all losses, claims, damages, and costs (including Lender’s attorneys’ fees) suffered or incurred by Lender as a result of any breach by Guarantor of the warranties, representations and agreements of this paragraph.

INTERPRETATION. In all cases where there is more than one Borrower or Guarantor, then all words used in this Guaranty in the singular shall be deemed to have been used in the plural where the context and construction so require; and where there is more than one Borrower named in this Guaranty or when this Guaranty is executed by more than one Guarantor, the words “Borrower” and “Guarantor” respectively shall mean all and any one or more of them. The words “Guarantor,” “Borrower,” and “Lender” include the heirs, successors, assigns, and transferees of each of them. If a court finds that any provision of this Guaranty is not valid or should not be enforced, that fact by itself will not mean that the rest of this Guaranty will not be valid or enforced. Therefore, a court will enforce the rest of the provisions of this Guaranty even if a provision of this Guaranty may be found to be invalid or unenforceable. If any one or more of Borrower or Guarantor are corporations, partnerships, limited liability companies, or similar entities, it is not necessary for Lender to inquire into the powers of Borrower or Guarantor or of the officers, directors, partners, managers, or other agents acting or purporting to act on their behalf, and any indebtedness made or created in reliance upon the professed exercise of such powers shall be guaranteed under this Guaranty.

NOTICES. Any notice required to be given under this Guaranty shall be given in writing, and, except for revocation notices by Guarantor, shall be effective when actually delivered, when actually received by telefacsimile (unless otherwise required by law), when deposited with a nationally recognized overnight courier, or, if mailed, when deposited in the United States mail, as first class, certified or registered mail postage prepaid, directed to the addresses shown near the beginning of this Guaranty. All revocation notices by Guarantor shall be in writing and shall be effective upon delivery to Lender as provided in the section of this Guaranty entitled “DURATION OF GUARANTY.” Any party may change its address for notices under this Guaranty by giving formal written notice to the other parties, specifying that the purpose of the notice is to change the party’s address. For notice purposes, Guarantor agrees to keep Lender informed at all times of Guarantor’s current address. Unless otherwise provided or required by law, if there is more than one Guarantor, any notice given by Lender to any Guarantor is deemed to be notice given to all Guarantors.

NO WAIVER BY LENDER. Lender shall not be deemed to have waived any rights under this Guaranty unless such waiver is given in writing and signed by Lender. No delay or omission on the part of Lender in exercising any right shall operate as a waiver of such right or any other right. A waiver by Lender of a provision of this Guaranty shall not prejudice or constitute a waiver of Lender’s right otherwise to demand strict compliance with that provision or

any other provision of this Guaranty. No prior waiver by Lender, nor any course of dealing between Lender and Guarantor, shall constitute a waiver of any of Lender’s rights or of any of Guarantor’s obligations as to any future transactions. Whenever the consent of Lender is required under this Guaranty, the granting of such consent by Lender in any instance shall not constitute continuing consent to subsequent instances where such consent is required and in all cases such consent may be granted or withheld in the sole discretion of Lender.

SUCCESSORS AND ASSIGNS. Subject to any limitations stated in this Guaranty on transfer of Guarantor’s interest, this Guaranty shall be binding upon and inure to the benefit of the parties, their successors and assigns.

FINANCIAL STATEMENT CERTIFICATIONS. The undersigned hereby certifies to California Bank & Trust (“Bank”) that all financial information (“Information”) submitted to Bank now and at all times during the terms of this loan does, and will, fairly and accurately represent the financial condition of the undersigned, all Borrowers and Guarantors. Financial Information includes, but is not limited to all Business Financial Statements (including Interim and Year-End financial statements that are company prepared and/or CPA-prepared), Business Income Tax Returns, Borrowing Base Certificates, Accounts Receivable and Accounts Payable Agings, Personal Financial Statements and Personal Income Tax Returns. The undersigned understands that the Bank will rely on all financial information, whenever provided, and that such information is a material inducement to Bank to make, to continue to make, or otherwise extend credit accommodations to the undersigned. The undersigned covenants and agrees to notify Bank of any adverse material changes in her/his/its financial condition in the future. The undersigned further understands and acknowledges that there are criminal penalties for giving false financial information to federally insured financial institutions.

DEPOSIT ACCOUNT SECURITY. Guarantor hereby grants a security interest to Lender in any and all deposit accounts (checking, savings, money market or time) of Guarantor at Lender, now existing or hereinafter opened, to secure its obligations hereunder. This includes all deposit accounts Guarantor holds jointly with someone else.

JURY WAIVER; JUDICIAL REFERENCE. Each of the parties hereto waives his, her or its respective rights to a trial before a jury in connection with any disputes related to this Guaranty, any of the Related Documents and the transactions contemplated hereby and thereby. Such disputes include without limitation any claims by a party, claims brought by Borrower or Guarantor as a class representative on behalf of others and claims by a class representative on Borrower’s or Guarantor’s behalf as a class member (so-called “class action” suits). This provision shall not apply if, at the time an action is brought, this Guaranty is entered into in a state where this jury trial waiver is not permitted by law.

If a jury trial waiver is not permitted by applicable law and a dispute arises between or among any of the parties hereto with respect to this Guaranty, any of the Related Documents, the enforcement hereof or thereof or the transactions contemplated hereby or thereby, any party to such dispute may require that it be resolved by judicial reference in accordance with California Code of Civil Procedure, Sections 638, et seq., including without limitation whether the dispute is subject to a judicial reference proceeding. The referee shall be a retired judge, agreed upon by the parties, from either the American Arbitration Association (AAA) or Judicial Arbitration and Mediation Service, Inc. (JAMS). If the parties cannot agree on the referee, the party who initially selected the reference procedure shall request a panel of ten retired judges from either AAA or JAMS, and the court shall select the referee from that panel. The referee shall be appointed to sit with all of the powers provided by law. The parties agree that time is of the essence in conducting the judicial reference proceeding set forth herein. The costs of the judicial reference proceeding, including the fee for the court reporter, shall be borne equally by the parties involved in the dispute as the costs are incurred, unless otherwise awarded by the referee. The referee shall hear all pre-trial and post-trial matters (including without limitation requests for equitable relief), prepare an award with written findings of fact and conclusions of law and apportion costs as appropriate. The referee shall be empowered to enter equitable relief as well as legal relief, provide all temporary or provisional remedies, enter equitable orders that are binding on the parties and rule on any motion that would be authorized in a trial, including without limitation motions for summary judgment or summary adjudication. Judgment upon the award shall be entered in the court in which such proceeding was commenced and all parties shall have full rights of appeal. This provision will not be deemed to limit or constrain Lender’s right of offset, to obtain provisional or ancillary remedies, to interplead funds in the event of a dispute, to exercise any security interest or lien Lender may hold in property or to comply with legal process involving Borrower’s accounts or other property.

Definitions. The following capitalized words and terms shall have the following meanings when used in this Guaranty. Unless specifically stated to the contrary, all references to dollar amounts shall mean amounts in lawful money of the United States of America. Words and terms used in the singular shall include the plural, and the plural shall include the singular, as the context may require. Words and terms not otherwise defined in this Guaranty shall have the meanings attributed to such terms in the Uniform Commercial Code:

BORROWER. The word “Borrower” means IRIS International, Inc. and includes all co-signers and co-makers signing the Note and all their successors and assigns.

GUARANTOR. The word “Guarantor” means everyone signing this Guaranty, including without limitation IRIS Molecular Diagnostics, Inc., and in each case, any signer’s successors and assigns.

GUARANTOR’S SHARE OF THE INDEBTEDNESS. The words “Guarantor’s Share of the Indebtedness” mean Guarantor’s indebtedness to Lender as more particularly described in this Guaranty.

GUARANTY. The word “Guaranty” means this guaranty from Guarantor to Lender.

INDEBTEDNESS. The word “Indebtedness” means Borrower’s indebtedness to Lender as more particularly described in this Guaranty.

LENDER. The word “Lender” means California Bank & Trust, its successors and assigns.

NOTE. The word “Note” means the Note executed by IRIS International, Inc. in the original principal amount of $6,500,000.00 dated February 7, 2002, together with all renewals of, extensions of, modifications of, refinancings of, consolidations of, and substitutions for the Note or Credit Agreement or any other subsequent Notes evidencing further Indebtedness.

RELATED DOCUMENTS. The words “Related Documents” mean all promissory notes, credit agreements, loan agreements, environmental agreements, guaranties, security agreements, mortgages, deeds of trust, security deeds, collateral mortgages, and all other instruments, agreements and documents, whether now or hereafter existing, executed in connection with the Indebtedness.

EACH UNDERSIGNED GUARANTOR ACKNOWLEDGES HAVING READ ALL THE PROVISIONS OF THIS GUARANTY AND AGREES TO ITS TERMS. IN ADDITION, EACH GUARANTOR UNDERSTANDS THAT THIS GUARANTY IS EFFECTIVE UPON GUARANTOR’S EXECUTION AND DELIVERY OF THIS GUARANTY TO LENDER AND THAT THE GUARANTY WILL CONTINUE UNTIL TERMINATED IN THE MANNER SET FORTH IN THE SECTION TITLED “DURATION OF GUARANTY”. NO FORMAL ACCEPTANCE BY LENDER IS NECESSARY TO MAKE THIS GUARANTY EFFECTIVE. THIS GUARANTY IS DATED AUGUST 31, 2010.

GUARANTOR:

LASER PRO Lending, Ver. 5.52.20.003 Copr. Harland Financial Solutions, Inc. 1997, 2010. All Rights Reserved. - CA L:\CFI\LPL\E20.FC TR-36507 PR-1 (M)