Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5327493 | Device for detecting tones on telephone lines | Robert L. Richmond, Martin R. Richmond, Richard Aydelotte | 1994-07-05 | $921,000 |
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Skip to contentShowing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5327493 | Device for detecting tones on telephone lines | Robert L. Richmond, Martin R. Richmond, Richard Aydelotte | 1994-07-05 | $921,000 |