Issued Patents All Time
Showing 25 most recent of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9969017 | Wire saw apparatus and cut-machining method | Shoji Imakurusu, Toshimitsu Iwai, Masaru Fukuman | 2018-05-15 |
| 8991381 | Method of cutting workpiece with wire saw, and wire saw | Tatsumi Hamasaki, Hiroyuki Yoshimura, Masaru Fukuman | 2015-03-31 |
| 7424200 | Information recording apparatus and information recording method | Hideo Nishijima, Hiroaki Ono, Kouji Minabe | 2008-09-09 |
| 7382986 | Signal converter, optical transmitter and optical fiber transmission system | Masaru Fuse, Seiichiro Kawashima | 2008-06-03 |
| 7196995 | Method of authenticating disk management information and disk device | Tatsuya Ishitobi, Hiroaki Ono | 2007-03-27 |
| 6822997 | Semiconductor laser module and optical transmission system | Kiyoshi Fujihara | 2004-11-23 |
| 6690893 | Optical transmitter | Masaru Fuse | 2004-02-10 |
| 6556327 | Signal converter, optical transmitter and optical fiber transmission system | Masaru Fuse, Seiichiro Kawashima | 2003-04-29 |
| 6406196 | Optical device and method for producing the same | Tomoaki Uno, Genji Tohmon, Masahiro Mitsuda | 2002-06-18 |
| 6335814 | Optical transmission system and optical transmitter and optical receiver used therefor | Masaru Fuse | 2002-01-01 |
| 5914808 | Intermediate isolator type fiber amplifier and fiber transmission system | Masahiro Mitsuda, Tomoaki Uno | 1999-06-22 |
| 5659558 | Short-wavelength laser element doped with rare earth ions, optical amplifier doped with rare earth ions, and wavelength converter doped with rare earth ions | Genji Tohmon, Tomoaki Uno | 1997-08-19 |
| 5623362 | Erbium-doped fiber amplifier and an optical fiber communication system | Masahiro Mitsuda | 1997-04-22 |
| 5598491 | Optical fiber amplifier and optical fiber transmission apparatus | Tomoaki Uno, Masahiro Mitsuda | 1997-01-28 |
| 5598294 | Optical fiber amplifier and optical fiber communication system | Tomoaki Uno, Masahiro Mitsuda | 1997-01-28 |
| 5563733 | Optical fiber amplifier and optical fiber transmission system | Masahiro Mitsuda, Tomoaki Uno | 1996-10-08 |
| 5530583 | Optical signal amplification apparatus and an optical fiber transmission system using the same | Tomoaki Uno, Katsuyuki Fujito | 1996-06-25 |
| 5453867 | Analog optical transmission system | Toshihiro Fujita, Hisanao Sato | 1995-09-26 |
| 5436751 | Analog optical transmission system and optical fiber amplifier | Toshihiro Fujita | 1995-07-25 |
| 5426656 | Laser element doped with rare earth ions, optical amplifier element doped with rare earth ions and rare-earth-ion-doped short-wavelength laser light source apparatus | Genji Tohmon, Hisanao Sato, Tomoaki Uno | 1995-06-20 |
| 5341237 | Rare earth ion doped optical element | Genji Tohmon, Hisanao Sato, Toshihiro Fujita | 1994-08-23 |
| 5321708 | Optical fiber amplifier doped with dysprosium ion for the 1.3 .mu.m wavelength band | Genji Tohmon, Hisanao Sato, Toshihiro Fujita | 1994-06-14 |
| 5177752 | Optical pulse generator using gain-switched semiconductor laser | Tetsuo Taniguchi | 1993-01-05 |
| 4980617 | Speed control apparatus of movable equipment | Fumio Tajima, Hiroshi Katayama, Tunehiro Endo, Kunio Miyashita, Seiichi Narushima +1 more | 1990-12-25 |
| 4910738 | Short optical pulse generators using mode-locked semiconductor lasers oscillating in transverse magnetic modes | Toshihiro Fujita | 1990-03-20 |