Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33094 | Electrophotographic member with alpha-si layers | Eiichi Maruyama, Sachio Ishioka, Yoshinori Imamura, Hirokazu Matsubara, Shinkichi Horigome +1 more | 1989-10-17 |
| 4829345 | Electronic device having light transmission system | Sachio Ishioka, Kazutaka Tsuji, Yukio Takasaki, Hirokazu Matsubara, Tadaaki Hirai | 1989-05-09 |