Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5428595 | Optical information recording and reproducing device | Yoshio Yoshida, Hideaki Sato, Yukio Kurata, Hiroyuki Yamamoto, Katsuhiro Kubo | 1995-06-27 |
| 5189655 | Optical head for optical disk recording/reproducing apparatus including modified Wollaston prism | Tetsuo Ueyama, Yoshihiro Sekimoto, Toshiyuki Tanaka, Hideaki Sato | 1993-02-23 |
| 5085496 | Optical element and optical pickup device comprising it | Yoshio Yoshida, Takahiro Miyake, Yasuo Nakata, Yukio Kurata, Tetsuo Ueyama +1 more | 1992-02-04 |
| 5050155 | Pick-up device for use in an optical information recording system utilizing a diffraction grating with blaze characteristics | Yukio Kurata, Hideaki Sato, Yasuo Nakata | 1991-09-17 |
| 4985880 | Optical information recording and reproducing apparatus | Yoshio Yoshida, Mitsuo Ishii, Yukio Kurata, Yasuo Nakata, Takayuki Inoue +1 more | 1991-01-15 |
| 4849825 | Pick-up device for use in an optical information recording system | Yukio Kurata, Hideaki Sato, Yasuo Nakata, Teruaki Inoue | 1989-07-18 |
| 4812638 | Focusing error detector and optical data detecting device incorporating the focusing error detector | Yasuo Nakata, Hideaki Satou, Toshiyuki Tanaka, Etsuji Minami, Yoshio Yoshida +2 more | 1989-03-14 |