Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884427 | Method of producing helical internal gear | Hisanobu Kanamaru | 1989-12-05 |
| 4580431 | Method and apparatus for producing a stepped hollow article | Masaharu Oku, Hisanobu Kanamaru | 1986-04-08 |