Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875939 | Precombustion chamber construction for an internal combustion engine | Minoru Machida | 1989-10-24 |
| 4856472 | Cylinder head with ceramic precombustion chamber | Akinori Wakasa, Minoru Machida, Seiichi Asami | 1989-08-15 |
| 4844037 | Precombustion chamber construction for internal combustion engine | Minoru Machida | 1989-07-04 |