Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5333820 | Railway vehicle wheel detector utilizing magnetic differential bridge | — | 1994-08-02 |
| 4535959 | Vital solid state relay for railroad alternating current track circuits | — | 1985-08-20 |
| 4407470 | Code reset apparatus for railroad track circuits | — | 1983-10-04 |
| 4298179 | Vital cross field transformer circuit arrangement for railroad signaling systems | — | 1981-11-03 |
| 4258312 | Vital voltage regulator and phase shift circuit arrangement | — | 1981-03-24 |
| 4200855 | Bolt-like railway vehicle wheel detector | — | 1980-04-29 |
| 4200856 | Differential clamp-on railway vehicle wheel detector | — | 1980-04-29 |
| 4188002 | Vital power varistor circuit for railroad signaling systems | — | 1980-02-12 |