Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8215348 | Coin convenience systems | — | 2012-07-10 |
| 5424903 | Intelligent power switcher | — | 1995-06-13 |
| 5414373 | Automatic transistor checker | Douglas R. Curtis | 1995-05-09 |
| 5373410 | Single string resistive divider network for a digital multimeter | Douglas R. Curtis | 1994-12-13 |
| 5355082 | Automatic transistor checker | Douglas R. Curtis | 1994-10-11 |
| 4811007 | High resolution video graphics system | — | 1989-03-07 |
| 4581588 | Switchable bandpass filter | — | 1986-04-08 |
| 4503429 | Computer graphics generator | — | 1985-03-05 |
| 4440987 | Computer and peripheral interface circuit | Jerry J. Heep | 1984-04-03 |
| 4436956 | Switchable bandpass filter | — | 1984-03-13 |