Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4525230 | Method of manufacturing a ballast resistor support member | Frederick Hetzel | 1985-06-25 |
| 4418328 | Method of manufacturing a ballast resistor support member and finished article | Frederick Hetzel | 1983-11-29 |