Issued Patents All Time
Showing 26–48 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7612936 | Optical amplifying apparatus for wavelength division multiplexed signals | Kaoru Usui, Yoshio Shimano, Hiroshi Iizuka | 2009-11-03 |
| 7202997 | Optical amplifier and optical amplifier control method | Hiroshi Iizuka, Kosuke Komaki | 2007-04-10 |
| 7061666 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Norifumi Shukunami, Susumu Kinoshita, Taiki Kobayashi | 2006-06-13 |
| 7040712 | Shield tunneling method and shield tunneling machine | Takeshi Sakae, Shunichi Sonomura, Wataru Naitou, Takashi Nakane, Shuusuke Mizuno +1 more | 2006-05-09 |
| 6977770 | Optical amplifier and control method therefor | Kosuke Komaki, Hiroshi Iizuka | 2005-12-20 |
| 6915864 | Cutter structure for shield machine | Yuuichi Asai, Osamu Takagi, Kazuo Takamizawa, Fumio Kondou, Hidetoshi Sakamoto | 2005-07-12 |
| 6698844 | Earth discharging device for upward-facing shield machine | Yuuichi Asai, Osamu Takagi, Kazuo Takamizawa, Fumio Kondou, Hidetoshi Sakamoto | 2004-03-02 |
| 6603596 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Norifumi Shukunami, Susumu Kinoshita, Taiki Kobayashi | 2003-08-05 |
| RE37948 | Video game apparatus, method and device for controlling same, and memory cartridge for video games | Hironobu Sakaguchi | 2002-12-31 |
| 6496300 | Optical amplifier | Susumu Kinoshita, Miki Onaka, Yasushi Sugaya, Chihiro Ohshima, Terumi Chikama +2 more | 2002-12-17 |
| 6439998 | Game apparatus, game controlling method and recording medium for use with battle video games | — | 2002-08-27 |
| 6373625 | Method, apparatus, and system for optical amplification | Taiki Kobayashi | 2002-04-16 |
| 6354940 | Game apparatus, game fight processing method, and computer readable storage medium storage program therefor | Takatsugu Nakazawa | 2002-03-12 |
| 5986799 | Optical amplifier having an attenuator for attenuating input power to eliminate a surge in an amplified optical signal | Tsukasa Takahashi | 1999-11-16 |
| 5870217 | Multi-wavelength optical batch amplification apparatus | Kazuo Yamane, Michikazu Shima | 1999-02-09 |
| 5841558 | Auxiliary-signal transmission system | Yuji Tamura, Tsukasa Takahashi, Michikazu Shima, Yumiko Kawasaki, Kazuo Yamane | 1998-11-24 |
| 5822112 | Control apparatus for optical amplifier | Michikazu Shima, Yoshihito Onoda, Yuji Tamura | 1998-10-13 |
| 5798857 | Auxiliary-signal transmission system | Yuji Tamura, Tsukasa Takahashi, Michikazu Shima, Yumiko Kawasaki, Kazuo Yamane | 1998-08-25 |
| 5680246 | Optical amplifier and optical transmission apparatus | Tsukasa Takahashi, Yuji Tamura, Michikazu Shima, Kazuo Yamane, Yumiko Kawasaki +6 more | 1997-10-21 |
| 5649862 | Video game apparatus, method and device for controlling same, and memory cartridge for video games | Hironobu Sakaguchi | 1997-07-22 |
| 5625481 | Auxiliary-signal transmission system | Yuji Tamura, Tsukasa Takahashi, Michikazu Shima, Yumiko Kawasaki, Kazuo Yamane | 1997-04-29 |
| 5390937 | Video game apparatus, method and device for controlling same | Hironobu Sakaguchi | 1995-02-21 |
| 4748527 | Magnetic head device with back core integral in holder shell | Yoshiharu Fujioka, Shoji Tsutaki, Mitsuo Katoh, Toshinobu Yoshida | 1988-05-31 |