Inventor
WAKAMATSU KAZUHIRO
JP40 patents
⚠️ This page may combine multiple inventors who share the name “WAKAMATSU KAZUHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
19 patentsUS6381428B1Apr 30, 2002
Photoconductor unit and image forming system
HITACHI LTD82 citations98
US6697586B2Feb 24, 2004
Photoconductor unit and image forming system
HITACHI LTD50 citations96
US6501925B2Dec 31, 2002
Photoconductor unit and image forming system
HITACHI LTD41 citations96
US6253039B1Jun 26, 2001
Color image forming apparatus
HITACHI LTD23 citations93
US6327447B1Dec 4, 2001
Electrophotographic apparatus having heat exhaustion device
HITACHI LTD34 citations92
US5113226AMay 12, 1992
Image transfer apparatus
HITACHI LTD27 citations92
US6081683AJun 27, 2000
Color electrophotographic apparatus with obliquely arranged photosensitive belt
HITACHI LTD17 citations84
US5621504AApr 15, 1997
Toner transferring device
HITACHI LTD13 citations74
US5373354ADec 13, 1994
Color electrophotographic device and method
HITACHI LTD9 citations74
US5291254AMar 1, 1994
Electrophotographic recording apparatus
HITACHI LTD19 citations74
US6308025B1Oct 23, 2001
Electrophotography apparatus
HITACHI LTD14 citations73
USD437348SFeb 6, 2001
Printer
HITACHI LTD11 citations73
US4922272AMay 1, 1990
High precision image recording apparatus
HITACHI LTD7 citations73
US4552449ANov 12, 1985
Compound image recording apparatus
HITACHI LTD14 citations73
US6760564B2Jul 6, 2004
Picture image forming apparatus with intermediate transfer belt trained around two rollers of different diameter
HITACHI LTD5 citations63
USD452703SJan 1, 2002
Printer
HITACHI LTD5 citations62
US6661994B2Dec 9, 2003
Electrophotographic image forming system
HITACHI LTD6 citations61
US6181889B1Jan 30, 2001
Image forming apparatus with reduced latent image vibration caused by photosensitive belt joint
HITACHI LTD2 citations60
US6694117B2Feb 17, 2004
Color photographic apparatus
HITACHI LTD3 citations57
RICOH PRINTING SYS LTD
4 patentsUS7298981B2Nov 20, 2007
Fixing device and image forming apparatus with guide having adjustable biasing angle
RICOH PRINTING SYS LTD23 citations92
US7142794B2Nov 28, 2006
Image forming apparatus
RICOH PRINTING SYS LTD5 citations63
US7292805B2Nov 6, 2007
Image forming apparatus having a sheet removal portion
RICOH PRINTING SYS LTD5 citations61
US7428394B2Sep 23, 2008
Electronic color photography apparatus
RICOH PRINTING SYS LTD0 citations52