KH

Kazumasa Hirai

HI Hitachi: 5 patents #7,555 of 28,497Top 30%
Ricoh Company: 4 patents #4,167 of 9,818Top 45%
HC Hitachi Electronic Devices Co.: 1 patents #50 of 92Top 55%
📍 Mobara, JP: #136 of 731 inventorsTop 20%
Overall (All Time): #584,994 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
7075221 Projection tube having different neck diameters Kouichi Saitou, Tetsuo Asano, Kotaro Aoki, Yasuo Tanaka 2006-07-11
6998767 Projection tube having different neck diameters Kouichi Saitou, Tetsuo Asano, Kotaro Aoki, Yasuo Tanaka 2006-02-14
6750602 Projection type cathode ray tube device employing a cathode ray tube having a neck composed of different-diameter portions Katsumi Hirota, Kotaro Aoki, Takashi Hoshimure 2004-06-15
6501935 Belt-type fixing apparatus having a fixing roller provided with a soft foam layer Shigeo Kurotaka 2002-12-31
6243559 Belt fixing device Shigeo Kurotaka 2001-06-05
6222309 Color cathode ray tube with specific skirt portion Hiroki Taga, Tatsuya Mochizuki 2001-04-24
6198888 Fixing device for controlling fixing temperature in a stable manner Shigeo Kurotaka 2001-03-06
6166482 Shadow mask structure with specific skirt portion Hiroki Taga, Tatsuya Mochizuki 2000-12-26
6055390 Fixing device and method for controlling fixing temperature in a stable manner Shigeo Kurotaka 2000-04-25