Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871794 | Pneumatic tires | Hisao Yamamoto, Nobuyuki Okamura | 1989-10-03 |
| 4818601 | Rubber-cord composite bodies | Tadashi Saito, Nobuyuki Okamura, Hisao Yamamoto, Yutaka Iseda, Hirohiko Takagi | 1989-04-04 |