Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862030 | Piezo-electric device | Katsunori Yokoyama, Yukio Sato | 1989-08-29 |
| 4824035 | Cage mill | Sousuke Naito, Hidekazu Takahashi, Toshio Watanabe, Yasuji Otsuka | 1989-04-25 |
| 4799601 | Translucent alumina ceramic tube and a process for making same | Yoshio Saito, Yawara Ando, Takashi Koseki | 1989-01-24 |