Patents

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Patents

7. Patents

	2020 Cost		Accumulated Amortization		2020 Net
Patents	$	208,211	$	178,074	$	30,137

	2019 Cost		Accumulated Amortization		2019 Net
Patents	$	204,102	$	157,526	$	46,576

Increase in 2020 cost was due to currency conversion. 2020 cost in Canadian dollars - $265,102 (2019 - $265,102 in Canadian dollars).

Amount of amortization for 2020: $16,439 (2019: $16,438) and is included in cost of sales in the consolidated statements of income and comprehensive income.

Estimated amortization expense over the next five years is as follows:

2021	$	16,438
2022		13,699