Patents

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Patents

7. Patents

	2018 Cost		Accumulated Amortization		2018 Net
Patents	$	194,320	$	131,306	$	63,014

	2017 Cost		Accumulated Amortization		2017 Net
Patents	$	212,426	$	132,974	$	79,452

Decrease in 2018 cost was due to currency conversion. 2018 cost in Canadian dollars - $265,102 (2017 - $265,102 in Canadian dollars).

Amount of amortization for 2018: $16,438 (2017: $16,438) and is included in cost of sales in the consolidated statements of income and comprehensive income.

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

2019	$	16,438
2020		16,438
2021		16,438
2022		13,700