Issued Patents All Time
Showing 51–65 of 65 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6151288 | Optical head assembly | Yuichi Takei, Yoshio Hayashi | 2000-11-21 |
| 6084844 | Optical head assembly | — | 2000-07-04 |
| 6016300 | Optical pickup head apparatus | Yoshio Hayashi, Hideo Takezoe, Ken Ishikawa | 2000-01-18 |
| 5828643 | Optical pickup head apparatus | Yoshio Hayashi, Hideo Takezoe, Ken Ishikawa | 1998-10-27 |
| 5793733 | Polarizing beam splitter and method for manufacturing same | Yoshio Hayashi, Satoru Nakao, Hideo Takezoe, Ken Ishikawa, Takaaki Suzuki +1 more | 1998-08-11 |
| 5761174 | Optical pickup device with split hologram element that diffracts light in direction parallel to track | Yoshio Hayashi, Ikuo Kasuga, Kazuo Higashiura, Noriyuki Satoh, Hisahiro Ishihara | 1998-06-02 |
| 5739952 | Polarizing beam splitter and optical head assembly | Yoshio Hayashi, Hideo Takezoe, Ken Ishikawa | 1998-04-14 |
| 5715219 | Displacement detecting device for optical head | Kenji Fukui, Ricardo Musashi Okamoto, Hiroyuki Wada | 1998-02-03 |
| 5687152 | Optical pickup system | Yoshio Hayashi | 1997-11-11 |
| 5648950 | Hologram integrated with a beam splitter to separate a plurality of polarized reflected light beams | Yoshio Hayashi | 1997-07-15 |
| 5351230 | Optical information system focal point displacement detecting means having Fresnel zone plates with rectilinear grating | Hiroyuki Wada, Kenji Fukui, Ricardo Musashi Okamoto, Shohei Hashiguchi | 1994-09-27 |
| 4943129 | Tapered optical waveguide, waveguide type optical head using same and optical waveguide | Noboru Ueno, Yasumitsu Miyazaki | 1990-07-24 |
| 4785508 | Female member of snap fastener | — | 1988-11-22 |
| 4430777 | Socket component for snap fastener | — | 1984-02-14 |
| 4253226 | Method for mounting up a plastic fastener | — | 1981-03-03 |