Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885981 | Spring return cylinder actuator | William J. Roettger | 1989-12-12 |
| 4339142 | Inner tube traction device | George Spector | 1982-07-13 |
| 4334469 | Can crusher | George Spector | 1982-06-15 |