Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882719 | Disk playing method for disk player | Yoshio Aoyagi, Fumio Endo | 1989-11-21 |
| 4879705 | Automatic loading disc player | Yoshio Aoyagi, Hiroyuki Hirano, Susumu Niinuma, Minoru Yoshioka, Akira Haeno +6 more | 1989-11-07 |
| 4855979 | Disk playing method for disk player | Yoshio Aoyagi, Fumio Endo | 1989-08-08 |
| 4841506 | Random playing method for disk player | Kazuhiro Kiyoura, Fumio Endo, Yoshio Aoyagi, Kazunari Nakamura | 1989-06-20 |
| 4840932 | Catalyst for producing 1,4-naphthoquinone | Ryo Matsuura, Shigeyuki Yoshimura, Yasuo Asanuma, Katsuaki Nasu, Haruo Yoshizumi +1 more | 1989-06-20 |
| 4829502 | Automatic loading disc player | Yoshiro Aoyagi, Susumu Niinuma, Minoru Yoshioka, Fumihiko Yokogawa, Keiichi Matsumoto +6 more | 1989-05-09 |
| 4829498 | Limited duration focusing in a vehicular disk player | Yoshio Aoyagi, Yoshinori Saito | 1989-05-09 |
| 4823056 | Pulse-width modulation drive circuit | Yoshihiko Watanabe, Tsuneyoshi Nagashita, Susumi Niinuma, Isamu Nomura, Kimito Kobayashi +7 more | 1989-04-18 |