Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4351565 | Roof sensing control of shearer in longwall mining | Ken Takahashi | 1982-09-28 |
| 4290648 | Mining apparatus | Ken Takahashi | 1981-09-22 |
| 4279443 | Mining apparatus | Ken Takahashi | 1981-07-21 |