Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863533 | Apex seal for rotary piston engine and method for manufacturing the same | Katsunori Hanakawa, Yasuo Uosaki | 1989-09-05 |
| 4856469 | Mechanical parts of valve driving mechanism for internal combustion engine | Kazuo Satou, Junichi Yamamoto | 1989-08-15 |
| 4838956 | Method of producing a spheroidal graphite cast iron | Kazuo Satou | 1989-06-13 |