Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6185056 | Prism and manufacturing method thereof, optical beam shaping apparatus and optical head device utilizing such prism, and optical beam shaping method | Seiji Nishiwaki | 2001-02-06 |
| 5963523 | Optical recording medium discriminating apparatus using laser beams of different wavelengths | Hiroshi Kayama, Ryoichi Imanaka | 1999-10-05 |
| 5946137 | Optical information processing unit | Kazuo Momoo | 1999-08-31 |
| 5757754 | Holographic optical head | Hiroaki Yamamoto, Seiji Nishino, Yoshiaki Komma, Hidenori Wada | 1998-05-26 |
| 5748599 | Holographic optical device | Hiroaki Yamamoto, Seiji Nishino, Yoshiaki Komma, Hidenori Wada | 1998-05-05 |
| 5687153 | Optical head device and optical information apparatus using a lithium niobate hologram with divisional areas to diffract light to corresponding photo detector areas | Yoshiaki Komma, Seiji Nishino, Shin-ichi Kadowaki, Hiroaki Yamamoto, Makoto Kato | 1997-11-11 |
| 5648951 | Movable optical head integrally incorporated with objective lens and hologram element | Makoto Kato, Yoshiaki Komma, Shin-ichi Kadowaki, Yoshikazu Hori, Seiji Nishino | 1997-07-15 |
| 5640380 | Optical head with a translucent plate to split a light beam | Yasuo Nishihara, Masatoshi Yajima | 1997-06-17 |
| 5315574 | Optical head with polarized beam hologram | Kazuo Momoo, Makoto Kato | 1994-05-24 |
| 5175717 | Optical head having a fixed optical casing and a movable optical casing | Kazuo Momoo, Shoji Gotoh | 1992-12-29 |
| 5151889 | Optical head device using cross-polarized from a light source for use in optical disk system | Kazuo Momoo | 1992-09-29 |
| 5111448 | Optical pickup head having a hologram-associated objective lens and optical information processing apparatus using the same | Yoshiaki Komma, Shinichi Kadowaki, Makoto Kato | 1992-05-05 |
| 5091793 | Optical head | Shoji Goto, Akihiro Sakata, Hiroshi Yamamoto, Kazuo Momoo | 1992-02-25 |
| 4929823 | Optical pickup head with holographic servo signal detection using a spot size detection system | Makoto Kato, Shunji Ohara | 1990-05-29 |
| 4734904 | Reproducing-only and recordable-reproduceable optical discs and common optical disc player therefor | Ryoichi Imanaka, Yoshihiro Okino | 1988-03-29 |
| 4507766 | Optical device for optically recording and reproducing information signals on an information carrier | Keiichi Yoshizumi | 1985-03-26 |
| 4447722 | Optical information reading device | — | 1984-05-08 |