Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6731846 | Dispersion compensator and optical transmission system using same | Kazuhiko Hosomi, Toshio Katsuyama, Young-kun Lee | 2004-05-04 |
| 6463191 | Optical switching device and optical switching method | Hideaki Tsushima, Masaya Horino, Kazutaka Sato | 2002-10-08 |
| 5737467 | Resin molded optical assembly | Takeshi Kato, Shinji Tsuji, Kimio Tatsuno, Satoru Kikuchi, Yoichi Yasuda | 1998-04-07 |
| 5644554 | Magnetic head load/unload device, method and a magneto-optical disk apparatus using the same | Kunio Harada, Toshimitsu Kaku, Masuo Kasai | 1997-07-01 |
| 5462811 | Magneto-optical recording media and mangeto-optical device using the media | Harukazu Miyamoto, Makoto Miyamoto, Keikichi Andoo, Toshio Niihara | 1995-10-31 |
| 5434844 | Magneto-optical recording media and magneto-optical recording device using the same | Harukazu Miyamoto, Toshio Niihara, Keikichi Andoo | 1995-07-18 |
| 5408452 | Optical information recording/reproducing system including novel tracking system | Akito Sakemoto, Toshinori Sugiyama, Zenji Tsutsumi, Shigeru Nakamura | 1995-04-18 |
| 5293567 | Optical recording method | Motoyasu Terao, Yoshio Taniguchi, Yasushi Tomioka, Shuji Imazeki | 1994-03-08 |
| 5270987 | Magneto-optical recording and reproducing method, magneto-optical memory apparatus and magneto-optical recording medium therefor | Toshimitsu Kaku, Shigeru Nakamura, Masahiko Takahashi, Toshio Niihara, Harukazu Miyamoto +7 more | 1993-12-14 |
| 5263015 | Magneto-optical recording media and overwrite recording method using the same | Toshio Niihara, Harukazu Miyamoto, Makoto Miyamoto, Keikichi Andoo, Tsuyoshi Toda +3 more | 1993-11-16 |
| 5253232 | Magneto-optical recording apparatus having a magnetic slider with increased rail width | Kyo Akagi, Takeshi Nakao | 1993-10-12 |
| 5245491 | Magneto-optical head employing optical fiber connected stationary and movable portions | Makoto Horie, Hideyuki Takashima, Hirobumi Ouchi, Shigeru Nakamura | 1993-09-14 |
| 5235591 | Stack type optical disc apparatus, sealed and separate type optical head therefor and optical disc medium | Shigeru Nakamura, Eiichi Seya, Seiichi Mita, Masuo Kasai, Hiroshi Yasuoka +5 more | 1993-08-10 |
| 5208827 | Semiconductor laser device having a transparent waveguide and a large second harmonic generation output | Misuzu Sagawa, Hiroaki Inoue, Kimio Tatsuno | 1993-05-04 |
| 5161135 | Magneto-optical disc memory apparatus including a header signal and magneto-optical signal level adjusting circuit | Atsushi Saito, Masaru Ito | 1992-11-03 |
| 5043960 | Overwritable magneto-optic recording and reproducing apparatus | Takeshi Nakao | 1991-08-27 |
| 5020041 | Magneto-optical memory apparatus having a floating magnetic head | Takeshi Nakao, Yoshinori Miyamura, Toyoji Okuwaki, Youichi Kawakubo, Yoshinori Takeuchi +1 more | 1991-05-28 |
| 5016234 | Two-laser collimated beam optical head with monitor | Shigeru Nakamura, Sadatsugi Machida, Takeshi Nakao | 1991-05-14 |
| 4985881 | Record carrier for a magneto-optical disc memory having guide grooves of a plurality of tracks disposed with a predetermined relation to light spot diameter | Atsushi Saito, Masaru Ito | 1991-01-15 |
| 4984231 | Optical information phase change recording medium having double protective layer | Hiroshi Yasuoka, Norio Murase, Motoyasu Terao, Tetsuya Nishida, Keikichi Andoo | 1991-01-08 |
| 4982396 | Information recording medium and apparatus using reversible phase change | Hiroshi Yasuoka, Motoyasu Terao, Tetsuya Nishida, Keikichi Andoo | 1991-01-01 |
| 4982389 | Magneto-optical recorder with compensation for variation in applied magnetic field intensity on a recording medium | Takeshi Nakao | 1991-01-01 |
| 4908813 | Wavelength multiplexing optical recording apparatus | Motoyasu Terao, Yoshio Taniguchi, Shuji Imazeki, Yasushi Tomioka | 1990-03-13 |
| 4901325 | Semiconductor laser device | Takeshi Kato, Kenichi Mizuishi, Katuaki Chiba, Takeshi Nakao, Shigeru Nakamura +1 more | 1990-02-13 |
| 4894816 | Optical information recording apparatus | Hirofumi Sukeda, Atsushi Saito | 1990-01-16 |