Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6052050 | Two-wire signal transmitter and method for maintaining integrity of electrical contacts | Michael Edward Colbaugh, Benjamin A. Giovannelli | 2000-04-18 |
| 4652986 | Vital inverter driver | — | 1987-03-24 |
| 4645148 | Fail-safe voltage-limiting circuit for an audio frequency overlay track circuit | — | 1987-02-24 |