PATENT COSTS (Tables)

6 Months Ended

Jun. 30, 2020

PATENT COSTS

Net Patent Costs

Patent costs may be creditable against future royalty revenues. For each period presented below, net patent costs consisted of:

	June 30,		December 31,
	2020		2019
Patents	$	1,272,625	$	1,272,625
Accumulated amortization		(740,636)		(699,348)
	$	531,989	$	573,277

Estimated Aggregate Future Amortization Expense

The estimated aggregate amortization expense for the remaining six months of 2020 and each of the years below is as follows:

July 1, 2020 – December 31, 2020	$	41,300
2021		65,400
2022		65,400
2023		65,400
2024		65,400
Thereafter		229,100