Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881498 | Rocker arm made of ceramics | Tooru Matsuura | 1989-11-21 |
| 4873952 | Engine cylinder head with precombustion chambers using porous ceramics insert | Mitsuyoshi Kawamura | 1989-10-17 |
| 4828009 | Method of manufacturing a complex body of sintered ceramic material and metal | Masato Taniguchi | 1989-05-09 |