Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5923114 | Brushless slip ring using rolling elements as electrical conductors | — | 1999-07-13 |
| 4791265 | Methods and apparatus for electric resistance welding | Louis F. Grama | 1988-12-13 |