Patents

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Patents

6.       Patents

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

	2016 Cost		Accumulated Amortization		2016 Net
Patents	$	197,448	$	101,558	$	95,890

Increase in 2017 cost was due to currency conversion. 2017 cost in Canadian dollars - $265,102 (2016 - $265,102 in Canadian dollars).

Amount of amortization for 2017: $16,438 (2016: $15,616) and is included in cost of sales in the consolidated statements of income and comprehensive income (loss).

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

2018	$	16,438
2019		16,438
2020		16,438
2021		16,438
2022		16,438