Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5892747 | Disk drive unit with a dustproof cap attached to a body module to protect internal components from dust | Yasushi Okada, Shuichi Honda | 1999-04-06 |
| 5668793 | Disk cartridge driving apparatus | Takashi Ogawa, Masaaki Sofue | 1997-09-16 |
| 5086422 | Optical disk apparatus | Toshimichi Hagiya, Junichi Watanabe, Tetsuo Kanno, Makoto Yamahata, Masaaki Sofue +1 more | 1992-02-04 |
| 4687916 | Optical pick-up device for both focus and error tracking detection | Masami Emoto | 1987-08-18 |
| 4684799 | Focus detection method involving cutting more than half of light beam reflected from disc | Masami Emoto | 1987-08-04 |
| 4683559 | Optical pickup with a two-detector arrangement | Masami Emoto, Hiroshi Gotoh | 1987-07-28 |