Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5345672 | Brake drum manufacture | Richard C. Ball, Elvin E. Tuttle | 1994-09-13 |
| 5138757 | Process for manufacturing a vehicle brake drum | Richard C. Ball, Elvin E. Tuttle | 1992-08-18 |