Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954805 | Piezo electronic horn | — | 1990-09-04 |
| 4952906 | Strobe alarm circuit | Bruce V. Testa | 1990-08-28 |
| 4929924 | Electronic alarm horn | Bruce V. Testa, Robert W. Right | 1990-05-29 |
| 4864275 | Solenoid operated doorbell | — | 1989-09-05 |
| 4736197 | Transit system third rail warning signal | Arthur L. Grodsky | 1988-04-05 |
| 4628213 | Electronic circuits for driving bells or electromagnetic devices | — | 1986-12-09 |