Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D318860 | Optical disc drive | Masaharu Sawatani, Midori Yonezawa | 1991-08-06 |
| 5022019 | Disk-storage device | Katsufusa Tanaka | 1991-06-04 |
| 4903252 | Disc file apparatus | Katsufusa Tanaka, Tohru Yamashita, Naoyuki Nakatsukasa, Takaharu Takematsu | 1990-02-20 |
| 4827463 | Disc memory device | Naoyuki Nakatsukasa, Katsufusa Tanaka, Tooru Yamashita | 1989-05-02 |