6. PATENTS (Tables)

3 Months Ended

Mar. 31, 2017

Patents Tables

Patents

	March 31, 2017 Cost		Accumulated Amortization		March 31, 2017 Net
Patents	$	199,330	$	107,549	$	91,781

	December 31, 2016 Cost		Accumulated Amortization		December 31, 2016 Net
Patents	$	197,448	$	101,558	$	95,890

Estimated depreciation expense

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

2017	$	16,438
2018		16,438
2019		16,438
2020		16,438
2021		16,438