Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4225294 | Oil seal means for rotary piston engines including a nitrided and ground surface | Toshihiko Hattori, Ichiro Yamagata, Toshio Yamada | 1980-09-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4225294 | Oil seal means for rotary piston engines including a nitrided and ground surface | Toshihiko Hattori, Ichiro Yamagata, Toshio Yamada | 1980-09-30 |