Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4793220 | Method of making a drill-shaped cutting tool and thread rolling dies | Fukuzo Yamamoto, Hisayoshi Yamamoto | 1988-12-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4793220 | Method of making a drill-shaped cutting tool and thread rolling dies | Fukuzo Yamamoto, Hisayoshi Yamamoto | 1988-12-27 |