Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873150 | High water-resistant member, and valve gear using the same for use in internal combustion engine | Masayuki Doi, Yoshitaka Kojima, Hisanobu Kanamaru, Susumu Aoyama | 1989-10-10 |