Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856469 | Mechanical parts of valve driving mechanism for internal combustion engine | Ken-ichi Okazaki, Junichi Yamamoto | 1989-08-15 |
| 4838956 | Method of producing a spheroidal graphite cast iron | Ken-ichi Okazaki | 1989-06-13 |