|3 Months Ended|
Mar. 31, 2021
|Goodwill and Intangible Assets Disclosure [Abstract]|
Note 5 – Patents.
In December 2017, we acquired from Rio Grande Neurosciences, Inc. (RGN) a patent portfolio for $4,500,000. The earliest patents expire in 2024. The following is a summary of patents less accumulated amortization at March 31, 2021 and December 31, 2020:
Amortization expense associated with patents was $161,728 for the three months ended March 31, 2021 and 2020. The estimated future amortization expense related to patents as of March 31, 2021 is as follows:
The entire disclosure for all or part of the information related to intangible assets.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef