Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883717 | Vibration-damping material | Shuji Kitamura, Takuzo Okumura, Yoshio Tadokoro, Hiroo Toya, Yoshiaki Togawa +5 more | 1989-11-28 |
| 4870429 | Optical foam-spacer disk assembly | Tsutomu Fujita, Yoshiaki Togawa, Seimei Yasui | 1989-09-26 |