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Note 6 - Patents and Trademarks, Net | 12 Months Ended
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Aug. 31, 2015
Notes to Financial Statements |
Intangible Assets Disclosure [Text Block] | 6. PATENTS AND TRADEMARKS, NET Patents and trademarks, net consisted of the following:
|  | August 31, 2015 |  | August 31, 2014
Patents and trademarks |  | $ | 2,440,022 |  |  | $ | 2,287,840 |
Less accumulated amortization |  |  | (1,177,803 | ) |  |  | (1,090,140 | )
|  | $ | 1,262,219 |  |  | $ | 1,197,700 |
Patent and trademark costs are amortized over seven years. Costs incurred related to patents and trademarks are capitalized until filed and approved, at which time the amounts capitalized to date are amortized and any further costs, including maintenance costs, are expensed as incurred. Amortization expense was $87,663, $86,652 and $71,405 for the years ended August 31, 2015, 2014 and 2013, respectively. Amortization expense is estimated to approximate $80,000 in each of the next five fiscal years.

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