Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4950933 | Carbon brush holder utilizing a worn brush detector | James R. Pipkin | 1990-08-21 |
| 4693638 | Roof bolt assembly having a sealing plug for preventing a deterioration of the mine roof | Konstanty F. Unrug, Samir K. Nandy | 1987-09-15 |
| 4335115 | Anti-acne composition | Stephen B. Carter, Gary Lee Manring | 1982-06-15 |