Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856472 | Cylinder head with ceramic precombustion chamber | Minoru Machida, Yasuhiro Miyakawa, Seiichi Asami | 1989-08-15 |
| 4834042 | Ceramic precombustion chamber for internal combustion engine | Kazuyuki Mizoguchi, Minoru Machida | 1989-05-30 |
| 4809654 | Ceramic precombustion chamber construction of internal combustion engine | Takayuki Ogasawara, Hideki Hosokawa, Minoru Machida, Itsuo Kondo | 1989-03-07 |