Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4620454 | Joint structure of tubular member and annular part | Susumu Aoyama, Toshio Yoshida | 1986-11-04 |
| 4575913 | Method of joining tubular member and annular parts | Susumu Aoyama, Toshio Yoshida | 1986-03-18 |
| 4300381 | Method for producing insert for diesel engine combustion chamber | Susumu Aoyama, Hiroshi Tokisue | 1981-11-17 |