Note 4 - Intangible Assets

6 Months Ended

Sep. 30, 2023

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, 2023										March 31, 2023
	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	$	(24,071	)	$	11,723	$	35,794	10	-	15	$	(22,631	)	$	13,163

Estimated aggregate future amortization expense related to intangible assets is as follows:

For the fiscal years ended March 31,
2024	$	1,443
2025		2,466
2026		1,980
2027		1,725
2028		1,725
Thereafter		2,384
	$	11,723