3. PATENTS

12 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

PATENTS

3. PATENTS

Patents consist of the following:

	March 31, 2019			March 31, 2018
Patents	$	211,645		$	211,645
Accumulated amortization		(144,977	)		(135,813	)
	$	66,668		$	75,832

Amortization expense for patents for each of the years ended March 31, 2019 and 2018 was $9,164. Future amortization expense on patents is estimated to be approximately $9,000 per year based on the estimated life of the patents. The weighted average remaining life of our patents is approximately 2.1 years.