Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889757 | Optical recording disk | Toshio Niihara, Norio Ohta, Yutaka Sugita, Yoshinori Miyamura, Ryoichi Sudo +2 more | 1989-12-26 |
| RE33094 | Electrophotographic member with alpha-si layers | Eiichi Maruyama, Sachio Ishioka, Yoshinori Imamura, Hirokazu Matsubara, Yasuharu Shimomoto +1 more | 1989-10-17 |
| 4866672 | Information-recording thin film and method for recording and reproducing information | Motoyasu Terao, Tetsuya Nishida, Yasushi Miyauchi | 1989-09-12 |
| 4835027 | Optical disc | Ryoichi Sudo, Hiroaki Miwa, Tetsuo Tajima | 1989-05-30 |
| 4817053 | Apparatus for storing and retrieving information using an electron beam | Tadashi Ikeda, Kazuo Shigematsu, Yasushi Miyauchi, Motoyasu Terao, Tetsuya Nishida +2 more | 1989-03-28 |
| 4806952 | Information recording apparatus for recording/reproducing information by irradiating an information recording medium with an energy beam | Tetsuya Nishida, Motoyasu Terao, Yasushi Miyauchi, Kazuo Shigematsu, Norio Ohta +2 more | 1989-02-21 |