YA

Yuji Arai

Ricoh Company: 118 patents #21 of 9,818Top 1%
NS Nippon Steel: 30 patents #16 of 4,423Top 1%
TC Taiyo Yuden Co.: 18 patents #59 of 959Top 7%
NM Nippon Steel & Sumitomo Metal: 16 patents #15 of 1,491Top 2%
SI Sumitomo Metal Industries: 13 patents #12 of 1,462Top 1%
SO Sony: 5 patents #7,785 of 25,231Top 35%
NE Nec: 2 patents #5,510 of 14,502Top 40%
SC Sanyo Electric Co.: 1 patents #3,644 of 6,347Top 60%
NA Nanao: 1 patents #12 of 27Top 45%
UN Unknown: 1 patents #29,356 of 83,584Top 40%
UC Usui Co.: 1 patents #15 of 34Top 45%
Overall (All Time): #3,263 of 4,157,543Top 1%
202
Patents All Time

Issued Patents All Time

Showing 176–200 of 202 patents

Patent #TitleCo-InventorsDate
6961535 Image forming apparatus Shinichi Kawahara, Satoshi Takano, Toshihiro Sugiyama, Hiroshi Saitoh, Hirokazu Ishii +1 more 2005-11-01
6937838 Waste toner collecting device, and image forming apparatus including the waste toner collecting device Hiroshi Ishii 2005-08-30
6895209 Cleaning device and image forming apparatus using the same Shinichi Kawahara, Satoshi Takano, Hiroshi Saitoh, Toshihiro Sugiyama, Hirokazu Ishii 2005-05-17
6829461 Recovered toner classifier capable of effectively removing foreign substance and crushing aggregation of toner Satoshi Takano 2004-12-07
6813467 Image forming apparatus Shinichi Kawahara, Satoshi Takano, Toshihiro Sugiyama, Hiroshi Saitoh, Hirokazu Ishii +1 more 2004-11-02
6615013 Powder classifying device and image forming apparatus having the powder classifying device Satoshi Takano 2003-09-02
6346364 Optical information recording medium and recording method Emiko Hamada, Yosikazu Takagisi, Takashi Ishiguro 2002-02-12
6262969 Optical disk Hideaki Ito, Yuaki Shin 2001-07-17
6156482 Optical information recording medium and recording method Emiko Hamada, Yosikazu Takagisi, Takashi Ishiguro 2000-12-05
6138191 Apparatus for selectively operating a plurality of computers Kenichi Fujii, Takashi Matsui 2000-10-24
6084603 Optical information medium and method for printing on the surface of the medium Takashi Ishiguro 2000-07-04
5920329 Optical information medium and method for printing on the surface of the medium Takashi Ishiguro, Toshio Watanabe 1999-07-06
5855793 Method of treating waste water to remove harmful ion by coagulating sedimentation Kenichi Ikeda, Yuichi Asai 1999-01-05
5750033 Method of treating waste water to remove harmful ion by coagulating sedimentation Kenichi Ikeda, Yuichi Asai 1998-05-12
5705247 Optical information medium and method for fabricating the same Takanobu Matumoto, Yuaki Shin, Takashi Ishiguro 1998-01-06
5616450 Method for fabricating an optical information medium Takanobu Matumoto, Yuaki Shin, Takashi Ishiguro 1997-04-01
5549952 Optical information medium and method for printing on the surface of the medium Takashi Ishiguro, Toshio Watanabe 1996-08-27
5470691 Optical information medium Takanobu Matumoto, Yuaki Shin, Takashi Ishiguro 1995-11-28
5407719 Optical information recording medium and recording method Emiko Hamada, Yosikazu Takagisi, Takashi Ishiguro 1995-04-18
5213955 Optical information recording medium and recording method Emiko Hamada, Yosikazu Takagisi, Takashi Ishiguro 1993-05-25
5155723 Optical information recording method and medium Emiko Hamada, Yuaki Shin, Takashi Ishiguro 1992-10-13
5090009 Optical information recording medium Emiko Hamada, Yuaki Shin, Takashi Ishiguro 1992-02-18
5020048 Optical information recording medium having a protective film which can be stripped Hiroshi Ogawa, Masahiro Hotori 1991-05-28
5009818 Method of manufacturing an optical information recorded disc Yuaki Shin, Takashi Ishiguro, Emiko Hamada 1991-04-23
4990388 Optical information recording medium Emiko Hamada, Yuaki Shin, Takashi Ishiguro 1991-02-05