PATENTS

3 Months Ended

Dec. 31, 2020

PATENTS

G. PATENTS

G. PATENTS

During the three months ended December 31, 2020 and 2019, no patent impairment charges were recorded. For both the three months ended December 31, 2020 and 2019, amortization of patent costs totaled approximately $13,000. Approximate estimated future amortization expense is as follows:

Nine months ending September 30, 2021	$	39,000
Year ending September 30,
2022		48,000
2023		38,000
2024		30,000
2025		27,000
2026		24,000
Thereafter		94,000
Total	$	300,000