Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875289 | Chisel for removing damaged bolts, nuts and screws | — | 1989-10-24 |
| 4865156 | Oil change device and method | — | 1989-09-12 |
| 4862776 | Drain plug removing device | — | 1989-09-05 |
| 4794827 | Drain plug removing device | — | 1989-01-03 |
| 4794843 | Hydraulic valve for controlling single-acting cylinder | — | 1989-01-03 |