Issued Patents All Time
Showing 76–99 of 99 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7414880 | Magnetoresistive effect element and magnetic memory | Tadashi Kai, Sumio Ikegawa, Yoshiaki Fukuzumi, Yoshihisa Iwata | 2008-08-19 |
| 7411263 | Magnetic memory device | Tadashi Kai, Sumio Ikegawa, Yoshiaki Fukuzumi, Tatsuya Kishi | 2008-08-12 |
| 7359295 | Optical pickup apparatus and optical disk drive apparatus | Hiroshi Akiyama | 2008-04-15 |
| 7355884 | Magnetoresistive element | Tadashi Kai, Tatsuya Kishi, Yoshiaki Fukuzumi, Toshihiko Nagase, Sumio Ikegawa +1 more | 2008-04-08 |
| 7328040 | Mobile-communication equipment and transmission power control method | — | 2008-02-05 |
| 7245524 | Magnetic memory device and write method of magnetic memory device | Hiroaki Yoda, Tadashi Kai, Sumio Ikegawa, Tatsuya Kishi | 2007-07-17 |
| 7099907 | Fir filter and ramp-up/-down control circuit using the same | — | 2006-08-29 |
| 7031289 | Control of amplitude level of baseband signal to be transmitted on the basis of the number of transmission codes | — | 2006-04-18 |
| 6845077 | Optical pick-up device with convergent light diffraction for recording/reading information on optical recording medium | Shigeru Oohchida, Hiroshi Akiyama | 2005-01-18 |
| 6675186 | Decibel adjustment device with shift amount control circuit | — | 2004-01-06 |
| 6584060 | Optical pick-up device for recording/reading information on optical recording medium | Shigeru Oohchida, Hiroshi Akiyama | 2003-06-24 |
| 6320913 | Circuit and method for controlling transmission amplifiers | — | 2001-11-20 |
| 6160773 | Optical disk device | Hiroshi Maegawa | 2000-12-12 |
| 6122241 | Optical pick-up device for processing central and peripheral optical signal components | Hiroshi Akiyama | 2000-09-19 |
| 6018510 | Phase change recording medium for allowing a tracking servo control based on a differential phase detection tracking method | Michiharu Abe, Michiaki Shinotsuka | 2000-01-25 |
| 5822286 | Optical disk unit, control method thereof, optical information recording medium and recording-regenerating method using this optical information recording medium | Hiroshi Koide, Akihiko Shimizu | 1998-10-13 |
| 5812520 | Optical disk unit, control method thereof, optical information recording medium and recording-regenerating method using this optical information recording medium | Hiroshi Koide, Akihiko Shimizu | 1998-09-22 |
| 5638354 | Optical information recording medium | Hiroshi Koide, Akihiko Shimizu | 1997-06-10 |
| 5515473 | Airtight seal structure of low melting point glass to be used in optical fiber guiding portion of optical device and method of airtight seal using low melting point glass | Kenji Yamauchi | 1996-05-07 |
| 5418765 | Apparatus for recording and reproducing optical information having an optical waveguide | Shigeyoshi Misawa, Kiyoshi Yokomori | 1995-05-23 |
| 5136559 | Optical information recording and reproducing apparatus using tracking mirror | — | 1992-08-04 |
| 5060214 | Optical pickup device keeping coincident the optical axes of the objective lens and of the recording/reproducing beam | Toshihiro Shigemori, Haruhiko Kono, Kiyoshi Yokomori | 1991-10-22 |
| 5023858 | Separation type optical pickup device | — | 1991-06-11 |
| 4815059 | Temperature-compensated optical pick-up device | Hiroshi Goto | 1989-03-21 |