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Note J - Patents - Summary of Patents (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Patents, cost | $ 4,017,510 | $ 4,017,510
Patents, impairment | (1,539,794) |
Patents, accumulated amortization | (2,042,443) | (1,227,762)
Patents, net | 435,273 | 2,789,748
Foundation Intellectual Property Patents [Member] |  |
Patents, cost | 1,377,863 | 1,377,863
Patents, impairment |  |
Patents, accumulated amortization | (942,590) | (787,821)
Patents, net | 435,273 | 590,042
Epidural-Apad Patents [Member] |  |
Patents, cost | 2,639,647 | 2,639,647
Patents, impairment | (1,539,794) |
Patents, accumulated amortization | (1,099,853) | (439,941)
Patents, net |  | $ 2,199,706

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