Note 4 - Intangible Assets4

6 Months Ended

Sep. 30, 2022

Notes to Financial Statements

Intangible Assets Disclosure [Text Block]

NOTE 4 - INTANGIBLE ASSETS

Intangible assets are being amortized using the straight-line method over periods ranging from 10-15 years with a weighted average remaining life of approximately 6 years.

	September 30, 2022										March 31, 2022
	Cost		Weighted Average Amortization Period (Years)			Accumulated Amortization			Net Carrying Amount		Cost		Weighted Average Amortization Period (Years)			Accumulated Amortization			Net Carrying Amount
Patents & Trademarks	$	35,794	10	-	15	$	(21,191	)	$	14,603	$	35,794	10	-	15	$	(19,751	)	$	16,043

Estimated aggregate future amortization expense related to intangible assets is as follows:
For the fiscal years ended September 30,
2023		2,882
2024		2,882
2025		2,275
2026		1,725
2027		1,725
Thereafter		3,114
	$	14,603