Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11510337 | Fan-equipped heatsink | Takuya IDE, Masaaki Murakami | 2022-11-22 |
| 8050154 | Drive control apparatus, drive control method and optical pickup apparatus | — | 2011-11-01 |
| 7369479 | Optical miniaturized module, optical pickup device, and optical disk device provided with light source and photodetector | Masaru Ogawa, Tetsuo Ueyama, Kohji Minami, Tomoyuki Miyake | 2008-05-06 |
| 7206351 | Signal evaluation devices and signal evaluation methods, signal quality evaluation methods and reproducing devices and recording devices | Tetsuya Okumura, Jun Akiyama, Shigemi Maeda, Masanori Ushioda | 2007-04-17 |
| 6967917 | Optical disk and optical disk apparatus using spatially separated grooves and lands for recording tracks | Shigemi Maeda | 2005-11-22 |
| 5831953 | Optical disk device using an optical pickup as a read mechanism for detecting a thickness of the substrate of an optical disk | — | 1998-11-03 |
| 5729517 | Data detecting circuit | Tsuneo Fujiwara | 1998-03-17 |
| 5434829 | Information reproducing apparatus for properly synchronizing the reproducing of recorded information | Shigemi Maeda, Kunio Kojima | 1995-07-18 |
| 5383174 | Optical disk apparatus | Takeshi Yamaguchi, Takashi Iwaki | 1995-01-17 |
| 5315571 | Information recording and reproducing device providing faster access time to a recording medium | Shigemi Maeda, Kunio Kojima, Jun Akiyama, Shigeo Terashima | 1994-05-24 |
| 5170389 | Semiconductor laser driving circuit with control circuit power voltage monitor for preventing inadvertent recording | Kunio Kojima, Toshihisa Deguchi, Shigeo Terashima | 1992-12-08 |
| 5101386 | Track jumping apparatus for an optical disk pickup | Kunio Kojima, Masaru Nomura, Takashi Iwaki | 1992-03-31 |
| 5084848 | Feedback control apparatus in an optical recording and reproducing device | Toshihisa Deguchi, Masaru Nomura, Kunio Kojima | 1992-01-28 |
| 5056076 | Method for controlling the rotational velocity of an information recording disk | Kentaroh Tsuji, Hiroshi Fuji, Tsuneo Fujiwara, Shigeo Terashima | 1991-10-08 |
| 5018120 | Optical recording medium track indexing system | Kentaroh Tsuji, Tsuneo Fujiwara, Hiroshi Fuji, Shigeo Terashima | 1991-05-21 |
| 5010540 | Apparatus for recording and reproducing information on and from an optical disk | Hiroshi Fuji, Tsuneo Fujiwara, Takashi Iwaki, Kentaroh Tsuji, Shigemi Maeda +4 more | 1991-04-23 |
| 5008888 | Semiconductor laser driving apparatus | Takashi Iwaki, Kunio Kojima, Toshihisa Deguchi | 1991-04-16 |
| 4993012 | Record face identifying device for magneto-optic record medium | Hiroshi Fuji, Tsuneo Fujiwara, Kentaroh Tsuji | 1991-02-12 |