Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5893893 | Device for the computerized recording of mileage and expenses in vehicles | Gregory A. Holt | 1999-04-13 |
| RE34788 | Pressure change intrusion detector | William K. Logsdon | 1994-11-15 |
| 5351289 | Caller ID telephone security device | William K. Logsdon | 1994-09-27 |
| 5185593 | Dual pressure change intrusion detector | William K. Logsdon | 1993-02-09 |
| 4928085 | Pressure change intrusion detector | William K. Logsdon | 1990-05-22 |
| 4552022 | Sound discriminator tester | — | 1985-11-12 |