6. PATENTS (Tables)

12 Months Ended

Dec. 31, 2015

Patents Tables

Patents

	2015 Cost		Accumulated Amortization		2015 Net
Patents	$	191,698	$	91,075	$	100,623

	2014 Cost		Accumulated Amortization		2014 Net
Patents	$	228,597	$	91,193	$	137,404

Estimated depreciation expense

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

2016	$	14,640
2017		14,640
2018		14,640
2019		14,640
2020		14,640