YT

Yasuo Takuma

HC Hitachi Koki Co.: 11 patents #93 of 888Top 15%
Ricoh Company: 10 patents #2,244 of 9,818Top 25%
HI Hitachi: 9 patents #4,653 of 28,497Top 20%
RS Ricoh Printing Systems: 3 patents #44 of 200Top 25%
Overall (All Time): #155,389 of 4,157,543Top 4%
26
Patents All Time

Issued Patents All Time

Showing 26–26 of 26 patents

Patent #TitleCo-InventorsDate
5291253 Corona deterioration and moisture compensation for transfer unit in an electrophotographic apparatus Takao Kumasaka, Yuzuru Simazaki, Masato Yamada, Nobuyoshi Hoshi 1994-03-01