Issued Patents All Time
Showing 51–75 of 106 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6683732 | Objective lens collision preventing device and method for manufacturing the same | Ikuya Kikuchi, Yoshitsugu Araki | 2004-01-27 |
| 6667947 | Optical multi-layer information recordating medium | Ikuya Kikuchi, Makoto Sato, Katsuhiro Koike, Yoshitsugu Araki | 2003-12-23 |
| 6628599 | Variable optical element, a pickup apparatus having the variable optical element, and an information recording and reproducing apparatus having the pickup apparatus | Hiroyuki Ota | 2003-09-30 |
| 6618346 | Optical pickup device having aperture restriction arrangement | Takayuki Nomoto | 2003-09-09 |
| 6597442 | Apparatus for measuring aberration of a lens and an apparatus for adjusting a position of the lens | Toshiharu Ezuka | 2003-07-22 |
| 6594091 | Optical pickup | Ikuya Kikuchi, Katsuhiro Koike, Makoto Sato | 2003-07-15 |
| 6584065 | Information recording medium apparatus for forming the same and information recording and reproducing systems | Ikuya Kikuchi | 2003-06-24 |
| 6542454 | Pickup device | — | 2003-04-01 |
| 6529339 | Lens and production method therefor | Katsuhiro Koike, Ikuya Kikuchi, Makoto Sato | 2003-03-04 |
| 6473378 | Optical recording apparatus | Mitsuru Sato | 2002-10-29 |
| 6442125 | Optical pickup | Yoshitsugu Araki, Hajime Koyanagi | 2002-08-27 |
| 6388966 | Optical information recording and reproducing apparatus | Mitsuru Sato | 2002-05-14 |
| 6381206 | Optical recording apparatus | — | 2002-04-30 |
| 6370092 | Optical pickup and optical disk drive for use with a high-density optical disk | Yoshitsugu Araki, Hajime Koyanagi | 2002-04-09 |
| 6339570 | Optical pickup system | Ikuya Kikuchi | 2002-01-15 |
| 6324155 | Optical information recording medium with flat reflecting film and reading system for reading information recorded thereon | — | 2001-11-27 |
| 6320699 | Aberration correcting apparatus and optical apparatus using the same | Ikuya Kikuchi | 2001-11-20 |
| 6091679 | Tracking error signal generating method and apparatus | Hiroki Kuribayashi | 2000-07-18 |
| 5889752 | Optical pickup apparatus with a crosstalk balance detecting circuit | Hajime Koyanagi | 1999-03-30 |
| 5784345 | Optical pickup device for eliminating unwanted data | Hajime Koyanagi | 1998-07-21 |
| 5687146 | Focus control device for use with an optical pickup comprising a refracting means | Noriaki Murao | 1997-11-11 |
| 5666340 | Optical recording medium information reproducing apparatus | — | 1997-09-09 |
| 5633844 | Optical pickup device with three beam tracking servo control using oval beams | Hajime Koyanagi | 1997-05-27 |
| 5612937 | Optical pickup apparatus having a bisected optical receiving element for tracking control | — | 1997-03-18 |
| 5572493 | Optical disk information recording apparatus and reproducing apparatus having a plurality of read or write beams | Kiyoshi Tateishi, Hajime Koyanagi | 1996-11-05 |