Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5107120 | Passive infrared detector | — | 1992-04-21 |
| 4904222 | Synchronized sound producing amusement device | Raymond F. Gastgeb | 1990-02-27 |
| 4904894 | Hail sensor | John C. Henry, Kyung-Tae Park | 1990-02-27 |
| 4870868 | Vibration sensing apparatus | Raymond F. Gastgeb | 1989-10-03 |
| 4706069 | Security system | Douglas E. McGovern | 1987-11-10 |