KO

Kazumasa Ohkawa

Kyocera: 3 patents #999 of 3,732Top 30%
UN Unknown: 2 patents #12,644 of 83,584Top 20%
📍 Yokkaichi, JP: #880 of 2,072 inventorsTop 45%
Overall (All Time): #1,659,422 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5262263 Layer electrophotographic sensitive member comprising morphous silicon Hisashi Higuchi, Hiroshi Hayashi, Shoji Mayama, Yoichiro Shimono 1993-11-16
4906546 Electrophotographic sensitive member Takao Kawamura, Naooki Miyamoto, Hiroshi Ito, Hitoshi Takemura, Kokichi Ishibitsu 1990-03-06
4882252 Electrophotographic sensitive member with amorphous silicon carbide Takao Kawamura, Naooki Miyamoto, Hiroshi Ito, Hitoshi Takemura, Kokichi Ishibitsu 1989-11-21