Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4912597 | Assembly of electric impedance elements | Frank Cathell | 1990-03-27 |
| 4270165 | Controller for d.c. current supplied by a plurality of parallel power supplies | Frank Cathell | 1981-05-26 |