NOTE 5 – INTANGIBLE ASSETS

At September 30, 2020, our intangible assets included patent costs and license costs totaling $155,507 and $241,909, respectively, less accumulated amortization of patent costs and license costs of $3,169 and $11,232, respectively. Amortization expense for the three months ended September 30, 2020 and 2019 was $640 and $313, respectively. Amortization expense for the nine months ended September 30, 2020 and 2019 was $13,152 and $742, respectively. At December 31, 2019, our intangible assets include patent costs totaling $127,593 less accumulated amortization of patent costs of $1,249.

Estimated amortization expense for the next five years for the patent and license costs currently being amortized is as follows: