Issued Patents All Time
Showing 1–8 of 8 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 |
| 4776431 | Oil change device | — | 1988-10-11 |
| 4713990 | Bolt extracting tool | — | 1987-12-22 |
| 4691618 | Hydraulic control valve | — | 1987-09-08 |