Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6522619 | Optical pick-up device having a plurality of light sources with different calorific values and method of manufacturing the same | Katsushige Yanagisawa, Tohru Hotta, Ikuo Kasuga, Satoru Kishita, Hidenori Sai | 2003-02-18 |
| 5373404 | Helical scan type rotary head drum unit | Daiichirou Katou, Hitoshi Yanagisawa, Takuji Sekiguchi, Kazuo Kobayashi | 1994-12-13 |
| 5270890 | Helical scan type rotary head apparatus | Daiichirou Katou, Takuji Sekiguchi, Tsuneharu Hashizume | 1993-12-14 |
| 5206771 | Tape drive mechanism | Daiichirou Katou, Tamotsu Mitsuyasu, Kazuo Abe, Takuji Sekiguchi, Hitoshi Yanagisawa +3 more | 1993-04-27 |