Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4604754 | Suspension device for resistor elements in furnaces | — | 1986-08-05 |
| 4236139 | Coil assembly | — | 1980-11-25 |
| 4207457 | Porcupine wire coil electric resistance fluid heater | Robert G. Grandi | 1980-06-10 |