Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5249102 | Portable electric device with sliding switch cover | Yoshio Ogawa, Hitoshi Isoda, Toshio Arai | 1993-09-28 |
| 4433125 | Oxygen permeable hard contact lens | Shoji Ichinohe, Yasuharu Tanaka | 1984-02-21 |
| 4235985 | Polymer for contact lens and contact lens made thereof | Kyoichi Tanaka, Mitsuhiro Kanada, Yasuyuki Kato, Masuji Ichihara | 1980-11-25 |