Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822105 | Double ended ranging drum shearer and method of controlling working height in mining face in use of the same | Ryuji Yamada | 1989-04-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822105 | Double ended ranging drum shearer and method of controlling working height in mining face in use of the same | Ryuji Yamada | 1989-04-18 |