KK

Kenji Koyama

Ricoh Company: 10 patents #2,244 of 9,818Top 25%
NC Nippon Conlux Co.: 7 patents #26 of 105Top 25%
Sumitomo Electric Industries: 6 patents #4,612 of 21,551Top 25%
Fujitsu Limited: 5 patents #6,029 of 24,456Top 25%
TC Toyo Soda Manufacturing Co.: 4 patents #37 of 272Top 15%
DI Daikin Industries: 2 patents #1,262 of 2,957Top 45%
TO Tosoh: 2 patents #354 of 1,042Top 35%
HI Hitachi: 2 patents #13,388 of 28,497Top 50%
RC Ricoh Optical Industries Co.: 1 patents #9 of 28Top 35%
TC Toho Titanium Co.: 1 patents #86 of 153Top 60%
TO Tosch: 1 patents #1 of 17Top 6%
TS Toshiba Electronic Devices & Storage: 1 patents #470 of 900Top 55%
AC Akita Electronics Systems Co.: 1 patents #3 of 36Top 9%
Canon: 1 patents #14,899 of 19,416Top 80%
HC Hitachi Cable: 1 patents #530 of 1,086Top 50%
HS Hitachi Tohbu Semiconductor: 1 patents #126 of 223Top 60%
Honda Motor Co.: 1 patents #12,035 of 21,052Top 60%
KT Kabushiki Kaisha Toshiba: 1 patents #13,537 of 21,451Top 65%
Mitsubishi Electric: 1 patents #15,491 of 25,717Top 65%
MK Murata Kikai: 1 patents #251 of 454Top 60%
RT Renesas Technology: 1 patents #1,991 of 3,337Top 60%
Overall (All Time): #57,743 of 4,157,543Top 2%
48
Patents All Time

Issued Patents All Time

Showing 1–25 of 48 patents

Patent #TitleCo-InventorsDate
12338921 Compressor and compressor unit Shoujirou NAKA 2025-06-24
12117218 Air conditioner Masahiro Yamamoto 2024-10-15
11842047 Magnetic disk device 2023-12-12
8964809 Semiconductor optical integrated device Yoshihiro Yoneda, Masaki Yanagisawa, Hirohiko Kobayashi, Kenji Hiratsuka 2015-02-24
8637329 Method for producing semiconductor optical integrated device Yoshihiro Yoneda, Hirohiko Kobayashi, Masaki Yanagisawa, Kenji Hiratsuka 2014-01-28
8618638 Semiconductor optical modulator and method for manufacturing the same Yoshihiro Yoneda, Hirohiko Kobayashi 2013-12-31
8563342 Method of making semiconductor optical integrated device by alternately arranging spacers with integrated device arrays Yoshihiro Yoneda, Hirohiko Kobayashi, Masaki Yanagisawa, Kenji Hiratsuka 2013-10-22
8530750 Multilayer printed circuit board 2013-09-10
8240746 Vehicle front body structure Hideaki Yamagishi 2012-08-14
8124543 Method for manufacturing semiconductor laser diode Hideki Yagi, Hiroyuki Yoshinaga, Kuniaki Ishihara 2012-02-28
7835638 Image recording apparatus, image recording method, and computer-readable recording medium 2010-11-16
7499640 Image-recording apparatus 2009-03-03
7405421 Optical integrated device Jun Hashimoto, Tsukuru Katsuyama 2008-07-29
7324781 Automatic document transportation device Yoshitaka Nose, Naritoshi Takamatsu 2008-01-29
7307368 DC motor Ikuya Tsurukawa, Yoshimi Ohno 2007-12-11
7091587 Semiconductor device Yusuke Sato, Toshihiro Miura, Toshihiko Kyogoku 2006-08-15
6918826 Coin treating device Kenji Nakajima, Yasuyuki Kodama, Takahiro Hayashi, Masato Yagi, Shinichi Kosugi +2 more 2005-07-19
6628893 DC motor rotation control apparatus Yoshimi Ohno, Ikuya Tsurukawa 2003-09-30
6617816 DC motor rotation detecting apparatus and DC motor rotation control apparatus Yoshimi Ohno, Ikuya Tsurukawa 2003-09-09
6579623 Composite material member for semiconductor device and insulated and non-insulated semiconductor devices using composite material member Yasutoshi Kurihara, Yasuo Kondo, Takumi Ueno, Toshiaki Morita, Takashi Suzumura +2 more 2003-06-17
6570350 DC motor rotation detecting apparatus and DC motor rotation control apparatus Yoshimi Ohno, Ikuya Tsurukawa 2003-05-27
6536577 Coin handling method and device Takeshi Ishida, Tsunehiro Aso 2003-03-25
6441484 Semiconductor device having switching elements around a central control circuit Norinaga Arai, Akio Mikami, Mamoru Iizuka 2002-08-27
6207735 Flame retardant and flame retardant resin composition containing it Kimitaka Kuma, Fumio Okizaki, Yasumi Tanaka 2001-03-27
6124394 Fire-retardant tablet, and fire-retarding method, fire-retardant polymer composition and molded article employing the same Mikio Goto, Yasumi Tanaka 2000-09-26