Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6754145 | Tilt compensation device for disk drive | Kazuhiko Nakane | 2004-06-22 |
| 6339567 | Method of and apparatus for optical information reproduction | Takehiko Umeyama, Yoshiji Inoue | 2002-01-15 |
| 6320830 | Optical information reproduction device and signal processing circuit used therein | Manabu Tsukamoto, Kenji Goto, Takehiko Umeyama, Yoshiji Inoue | 2001-11-20 |
| 5946285 | Optical disk having a continuous information track formed of alternating land and groove track revolutions and a method of tracking the optical disk | Kazuhiko Nakane, Masato Nagasawa, Hiroyuki Ohata, Kouichi Komawaki, Kenji Gotoh +1 more | 1999-08-31 |
| 5475666 | Optically modulated overwritable recording device | Masaya Ito, Osamu Ito, Kouichi Yamada, Yoshiki Nakajima, Kouichi Takeuchi +1 more | 1995-12-12 |
| 5309415 | Information recording method for overwriting a magneto-optic recording medium with two intensities of light beams | Koichi Takeuchi, Osamu Ito, Kyosuke Yoshimoto, Kunimaro Tanaka, Isao Watanabe +6 more | 1994-05-03 |
| 5278815 | Digital data reproducing apparatus | Akira Mashimo, Mitsumasa Kubo, Fumio Hishiyama, Teruo Furukawa | 1994-01-11 |
| 5272684 | Information recording method and information recording apparatus for magneto-optic recording information medium | Koichi Takeuchi, Osamu Ito, Kyosuke Yoshimoto, Kunimaro Tanaka, Isao Watanabe +6 more | 1993-12-21 |
| 5264911 | Laser power measuring jig for optical disk unit | Kazuhiko Nakane, Yoshihiro Kiyose, Keiji Nakatsu, Isao Watanabe, Masami Horita +4 more | 1993-11-23 |
| 5218591 | Optical disk apparatus for shaping pits recorded on an optical disk | Kunimaro Tanaka, Isao Watanabe, Osamu Ito | 1993-06-08 |
| 5107483 | Frequency selective optical data record/regenerate apparatus | Yoshiki Nakajima, Kunimaro Tanaka, Kyosuke Yoshimoto, Motomu Yoshimura, Mitsuo Maeda +7 more | 1992-04-21 |
| 5007038 | Method and apparatus for producing an accurate error signal in an optical recording medium driver | Kazuhiko Nakane, Teruo Furukawa, Kyosuke Yoshimoto | 1991-04-09 |
| 5003525 | Apparatus for reading a magneto-optical disk | Kazuhiko Nakane, Teruo Furukawa | 1991-03-26 |