Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8693295 | Optical disc medium and optical disc device | Kenya Nakai, Nobuo Takeshita | 2014-04-08 |
| 8472300 | Optical head device and optical disc device | Hironori Nakahara, Masayuki Omaki, Kenya Nakai, Nobuo Takeshita | 2013-06-25 |
| 8134908 | Diffractive optical element and optical pickup | Daisuke Matsubara, Kenya Nakai, Hironori Nakahara | 2012-03-13 |
| 8077581 | Optical pickup and optical disc drive | — | 2011-12-13 |
| 8018799 | Optical pickup device and optical disc device | Daisuke Matsubara | 2011-09-13 |
| 7848206 | Diffractive optical element and optical head | Daisuke Matsubara | 2010-12-07 |
| 7782730 | Optical-pickup-adjustment optical disk, method of adjusting optical pickup device, and method of producing optical pickup device | Daisuke Matsubara, Kenya Nakai, Hironori Nakahara | 2010-08-24 |
| 7652246 | Optical pickup device and optical disk device | Daisuke Matsubara | 2010-01-26 |
| 7266072 | Semiconductor laser unit and optical head device | Kenya Nakai | 2007-09-04 |
| 6912192 | Semiconductor laser unit and optical head device | Kenya Nakai | 2005-06-28 |
| 5986984 | Optical information processing device having switchable optics for use with plural media types | Keiji Nakamura, Takeshi Utakouji, Norihiro Watanabe, Nobuo Takeshita, Hideaki Kobachi +4 more | 1999-11-16 |
| 5511048 | Magneto-optical recording and reproducing apparatus | Mitsuru Irie, Takeshi Utakouji, Morihiro Karaki, Nobuo Takeshita, Manabu Koike +5 more | 1996-04-23 |
| 5469423 | Laser power control of an optical head with a plurality of beam sources | Naoyuki Egusa, Yasuyuki Sato, Manabu Koike | 1995-11-21 |
| 5434834 | Optical recording and reproducing apparatus for tracking wobbling guide grooves | Kenjiro Kime, Toshiya Matozaki, Keiji Nakamura, Toru Yoshihara, Takeshi Ito | 1995-07-18 |
| 5383169 | Optical recording and reproducing apparatus for tracking wobbling guide grooves | Kenjiro Kime, Toshiya Matozaki, Keiji Nakamura, Toru Yoshihara, Takeshi Ito | 1995-01-17 |
| 5367512 | Multi-beam optical recording-reproduction device with independent error detection for each beam | Yasuyuki Satou, Morihiro Karaki | 1994-11-22 |
| 5359588 | Optical recording/reproducing apparatus | Teruo Fujita, Naoyuki Egusa, Yasuyuki Sato, Manabu Koike | 1994-10-25 |
| 5303216 | Optical recording and reproducing apparatus for tracking wobbling guide grooves | Kenjiro Kime, Toshiya Matozaki, Keiji Nakamura, Toru Yoshihara, Takeshi Ito | 1994-04-12 |
| 5130965 | Optical recording/reproducing apparatus using a light spot switching means for centering beams on an information track | Morihiro Karaki, Yasuyuki Satou | 1992-07-14 |
| 4942584 | Semiconductor laser apparatus driving system | Morihiro Karaki, Yasuyuki Satou | 1990-07-17 |
| 4935913 | Optical information recording and reproducing apparatus | — | 1990-06-19 |