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H. PATENTS

3 Months Ended

Dec. 31, 2017

During the three months ended December 31, 2017 and 2016, no patent impairment charges were recorded. For the three months ended December 31, 2017 and 2016, amortization of patent costs totaled approximately $9,000. Approximate estimated future amortization expense is as follows:

Nine months ending September 30, 2018	$	27,000
Year ending September 30,
2019		35,000
2020		32,000
2021		29,000
2022		25,000
2023		15,000
Thereafter		52,000
Total	$	215,000