Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4755116 | Rotor housing for a rotary piston engine having softened areas surrounding the plug holes | Kouji Tarumoto, Yoshifumi Yamamoto | 1988-07-05 |
| 4738602 | Method for manufacturing an apex seal for a rotary piston engine using high energy heating radiation | Yoshifumi Yamamoto, Katsuya Ohuchi, Tsutomu Shimizu | 1988-04-19 |
| 4228203 | Method of forming aluminum coating layer on ferrous base alloy workpiece | Toshiro Yagi, Hideo Kohara | 1980-10-14 |