Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36248 | Method of making a carbon commutator | Bruce Ramsey | 1999-07-13 |
| 5255426 | Method of making a carbon commutator | D. Bruce Ramsey, Sr. | 1993-10-26 |
| 5175463 | Carbon commutator | D. Bruce Ramsey, Sr. | 1992-12-29 |