PATENTS

9 Months Ended

Jun. 30, 2020

PATENTS

G. PATENTS

 G.         PATENTS

During the nine months ended June 30, 2020 and 2019, no patent impairment charges were recorded. For the nine months ended June 30, 2020 and 2019, amortization of patent costs totaled approximately $40,000 and $72,000, respectively. For the three months ended June 30, 2020 and 2019, amortization of patent costs totaled approximately $14,000 and $49,000, respectively. Approximate estimated future amortization expense is as follows:

Three months ending September 30, 2020	$	13,000
Year ending September 30,
2021		51,000
2022		47,000
2023		37,000
2024		29,000
2025		27,000
Thereafter		107,000
Total	$	311,000