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PATENTS | 3 Months Ended
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Dec. 31, 2023
PATENTS |
PATENTS | G. PATENTS During the three months ended December 31, 2023 and 2022, there was no impairment of patent costs. The weighted average amortization period for patents is approximately 8 years. Amortization expense for the three months ended December 31, 2023 and 2022 totaled approximately $9,000 and $10,000, respectively. The total estimated future amortization is as follows:
Nine months ending September 30, 2024 |  | $ | 23,000 |
Year ending September 30, |  |  |  |
2025 |  |  | 29,000 |
2026 |  |  | 25,000 |
2027 |  |  | 22,000 |
2028 |  |  | 19,000 |
2029 |  |  | 16,000 |
Thereafter |  |  | 54,000 |
Total |  | $ | 188,000 |

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