Attached files
| file | filename |
|---|---|
| 10-K - 10-K - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | a09-34324_110k.htm |
| EX-10.13 - EX-10.13 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | a09-34324_1ex10d13.htm |
| EX-32.2 - EX-32.2 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | a09-34324_1ex32d2.htm |
| EX-32.1 - EX-32.1 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | a09-34324_1ex32d1.htm |
| EX-21.1 - EX-21.1 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | a09-34324_1ex21d1.htm |
| EX-31.2 - EX-31.2 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | a09-34324_1ex31d2.htm |
| EX-31.1 - EX-31.1 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | a09-34324_1ex31d1.htm |
| EX-10.14 - EX-10.14 - NORTHERN TECHNOLOGIES INTERNATIONAL CORP | a09-34324_1ex10d14.htm |
Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the Registration Statements on Form S-8 (File Nos. 333-32596, 333-140244 and 333-140245) and Registration Statement on Form S-3 (File No. 333-153891) of Northern Technologies International Corporation and Subsidiaries of our report dated November 30, 2009, which appears on page 43 of this annual report on Form 10-K for the year ended August 31, 2009.
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/s/ Baker Tilly Virchow Krause, LLP |
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Minneapolis, Minnesota |
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November 30, 2009 |
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