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Note J - Intangible Assets | 12 Months Ended
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Dec. 31, 2019
Notes to Financial Statements |
Intangible Assets Disclosure [Text Block] | NOTE J —INTANGIBLE ASSETS Intangible assets consisted of the following as of December 31:
|  |  |  |  |  | 2019 |  |  | 2018 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Write-offs |  |  | Net Carrying Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Patents and patents pending |  | $ | 380,080 |  |  | $ | (210,694 | ) |  | $ | (15,000 | ) |  | $ | 154,386 |  |  | $ | 378,344 |  |  | $ | (182,438 | ) |  | $ | 195,906 |
Aggregate amortization expense for 2019 and 2018 was $28,256 and $15,596, respectively. In 2019, the Company recorded $15,000 of write offs of patents rejected. Amounts are recorded in Research, Development and engineering expense. The estimated aggregate amortization expense of intangible assets for the years following December 31, 2019 is approximately $ 20,000 per year for 2020 through 2022, $17,000 for 2023, $13,000 for 2024 and approximately $65,000 thereafter.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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