KK

Keizo Kawaguchi

SC Stanley Electric Co.: 4 patents #170 of 1,072Top 20%
PL Pilot Ink Company, Limited: 2 patents #40 of 110Top 40%
CO Colin: 1 patents #30 of 47Top 65%
DC Daido Steel Co.: 1 patents #95 of 272Top 35%
Overall (All Time): #642,344 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
9595635 Point source light-emitting diode Masumi Hirotani, Shinji Iio, Hidetoshi Sone, Cheng-Chung Yang 2017-03-14
7880187 Semiconductor light emitting device having narrow radiation spectrum Ken Sasakura, Hanako Ono 2011-02-01
7084422 Semiconductor light emitting device having quantum well layer sandwiched between carrier confinement layers Tsuyoshi Maruyama, Kazuhisa Ishii, Ken Sasakura, Shotaro Tomita, Toshio Tomiyoshi 2006-08-01
6900467 Semiconductor light emitting device having quantum well layer sandwiched between carrier confinement layers Tsuyoshi Maruyama, Kazuhisa Ishii, Ken Sasakura, Shotaro Tomita, Toshio Tomiyoshi 2005-05-31
5980571 Substitute-heart control apparatus Takashi Nomura, Douglas W. Blakely, Setsuo Takatani 1999-11-09
5707900 Method of heat-treating semiconductor crystal of a group II-group VI compound Michihiro Sano 1998-01-13
4749618 Tip member for coating tool Kiyoshi Kuroyanagi, Gengo Shinada, Yasutaka Shinguu 1988-06-07
4664711 Ink for marking pen Takafusa Ando 1987-05-12