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Note 7 - Patents - Summary of Patents (Details) - USD ($) | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Patents, cost | $ 1,377,863 | $ 1,377,863
Patents, impairment | (1,059,966) | (1,048,614)
Patents, accumulated amortization | 317,897 | 329,249
Foundation Intellectual Property Patents [Member] |  |
Patents, cost | 1,377,863 | 1,377,863
Patents, impairment | (1,059,966) | (1,048,614)
Patents, accumulated amortization | $ 317,897 | $ 329,249

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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