Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6798819 | Optical pickup apparatus and method of manufacturing the same | Tohru Hotta | 2004-09-28 |
| 6584061 | Optical pick-up device | Katsushige Yanagisawa, Tohru Hotta, Satoru Kishita | 2003-06-24 |
| 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, Toshihiko Okina, Satoru Kishita, Hidenori Sai | 2003-02-18 |
| 6369963 | Optical pickup apparatus | Tohru Hotta, Katsushige Yanagisawa | 2002-04-09 |
| 6125091 | Optical pickup apparatus for use with various types of optical disks | — | 2000-09-26 |
| 5844881 | Objective lens driving device capable of holding an objective lens at a specific neutral point | Fumio Kobayashi, Toru Kamada, Akihiko Okumura | 1998-12-01 |
| 5761174 | Optical pickup device with split hologram element that diffracts light in direction parallel to track | Tadashi Takeda, Yoshio Hayashi, Kazuo Higashiura, Noriyuki Satoh, Hisahiro Ishihara | 1998-06-02 |
| 5599864 | Polyarylene sulfide resin composition and optical pick-up parts formed from the same | Shogo Ogawa, Hajime Hata, Hiromasa Marumo, Masamichi Hayakawa | 1997-02-04 |
| 5541898 | Device for driving an objective lens | Toru Kamada, Fumio Kobayashi, Yasuyuki Nakahara | 1996-07-30 |
| 5517362 | Optical pickup device | Tatuki Wade, Akira Miyamae | 1996-05-14 |
| 5496993 | Optical pickup device with wedge shaped and concave lens for correcting a coma and astigmatism | — | 1996-03-05 |
| 5488594 | Objective actuator for positioning an optical pick-up device | Fumio Kobayashi, Akira Miyamae | 1996-01-30 |
| 4998802 | Objective lens driving device in an optical pickup | Toru Kamada, Fumio Kobayashi | 1991-03-12 |
| 4968874 | Optical pickup with astigmatism correcting lens | — | 1990-11-06 |
| 4962999 | Optical pick-up device | — | 1990-10-16 |
| 4664476 | Magnetic objective lens driving apparatus with pivot | — | 1987-05-12 |