Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9207252 | Speed detection apparatus and driving mechanism control apparatus | Shuhei Hamada, Takashi Fukuhara, Yasuyuki Miyaoka | 2015-12-08 |
| 9195177 | Belt driving device and image forming apparatus | Toru Miyazawa, Takaaki Aoyagi, Yuri Mori | 2015-11-24 |
| 9072122 | Heating apparatus for heating a toner image and image forming apparatus including the same | Hisae Shimizu, Isao Hayashi, Masaaki Naoi | 2015-06-30 |
| 8977167 | Image forming apparatus | Tatsuru Seki | 2015-03-10 |
| 7460451 | Information-reproducing apparatus equipped with PLL circuit | — | 2008-12-02 |
| 7298683 | Optical information recording/reproducing apparatus with mechanism for correcting spherical aberration and method using same | — | 2007-11-20 |
| 5953296 | Optical information recording/reproducing apparatus and method with automatic servo loop adjustment function | — | 1999-09-14 |
| 5875162 | Optical information recording and/or reproducing apparatus improved in servo characteristics | — | 1999-02-23 |
| 5808984 | Optical information recording and/or reproducing apparatus and method arranged to detect inclination of objective lens | — | 1998-09-15 |
| 5796687 | Information recording and reproducing apparatus with offset compensation circuit and method therefor | — | 1998-08-18 |
| 5768227 | Optical information recording and or reproducing apparatus and method for irradiating a recording medium having a plurality of information tracks | — | 1998-06-16 |
| 5748583 | Information recording/reproducing apparatus with counter means accessible by system and servo processing units | — | 1998-05-05 |
| 5699330 | Magnetooptical disc apparatus having single micro-processor for controlling input/output processing of information by causing an interruption in the processing | Tsukasa Ogino, Hirotake Ando, Yoshihiro Saga | 1997-12-16 |
| 5583837 | Automatic loop gain control apparatus | Tsukasa Ogino | 1996-12-10 |
| 5559770 | Automatic gain control method and device for servo loop, and information recording and/or reproduction apparatus | Tomoyuki Hiroki | 1996-09-24 |
| 5532990 | Optical information processing method and apparatus including measuring and correcting the offset of a tracking error signal from an output of a photodetector using a vibrating objective lens | Osamu Koyama, Tadashi Kato, Masayuki Usui, Yoshihiko Watanabe, Hirotake Ando +3 more | 1996-07-02 |
| 5517475 | Optical information processing apparatus in which the offset of a tracking error signal is corrected in accordance with a relationship stored in a memory, in response to a position detection output signal | Osamu Koyama, Tadashi Kato, Masayuki Usui, Yoshihiko Watanabe, Hirotake Ando +3 more | 1996-05-14 |
| 5404346 | Optical information processing apparatus including a correction circuit for correcting non-linearity of an output of a position detection circuit | Osamu Koyama, Tadashi Kato, Masayuki Usui, Yoshihiko Watanabe, Hirotake Ando +3 more | 1995-04-04 |
| 5347503 | Optical information processing apparatus for correcting linearity of a photosensor output with respect to power of an emitted light beam | Osamu Koyama, Tadashi Kato, Masayuki Usui, Yoshihiko Watanabe, Hirotake Ando +3 more | 1994-09-13 |
| 5260923 | Optical information processing apparatus in which an optical head is moved in accordance with a lens positional signal eliminating an eccentric component therefrom | — | 1993-11-09 |
| 4972395 | Opto-magnetic recording apparatus for sequentially driving optical head drive means and biasing magnetic field generation means | — | 1990-11-20 |
| 4955011 | Information recording/reproducing apparatus with control device for maintaining head velocity below a critical velocity | — | 1990-09-04 |
| 4858214 | Tracking control apparatus | — | 1989-08-15 |
| 4841407 | Magnetic field generator having a plurality of coils for generating magnetic field in substantially the same space and method of driving the same | Naoki Imokawa, Makoto Shiho | 1989-06-20 |