PATENTS

6 Months Ended

Mar. 31, 2023

PATENTS

PATENTS

G. PATENTS

During the six months ended March 31, 2023 and 2022, the Company recorded approximately $0 and $31,000 in patent impairment charges. No patent impairment charges were recorded during the three months ended March 31, 2023 and 2022. For the six months ended March 31, 2023 and 2022, amortization of patent costs totaled approximately $20,000 and $27,000, respectively. For the three months ended March 31, 2023 and 2022, amortization of patent costs totaled approximately $10,000 and $13,000, respectively. Approximate estimated future amortization expense is as follows:

Six months ending September 30, 2023	$	18,000
Year ending September 30,
2024		30,000
2025		28,000
2026		24,000
2027		21,000
2028		17,000
Thereafter		54,000
Total	$	192,000