Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859523 | Viscoelastic resin for vibration damping material | Hiroshi Endoh, Yoshimasa Zama, Nobuo Kadowaki, Takeshi Yatuka, Hiroshi Nagai | 1989-08-22 |
| 4842942 | Magnetic recording medium | Takeshi Yatsuka, Nobukazu Kotera | 1989-06-27 |