Inventor
HIRONO TATSUO
JP10 patents
Patents
10 patentsUS4682158AJul 21, 1987
Guidance device for manipulation of machine
RICOH KK116 citations94
US5159392AOct 27, 1992
Image forming apparatus for forming an image on one or both sides of a recording medium
RICOH KK34 citations92
US5160969ANov 3, 1992
Image forming apparatus having a separate black developer stored for a color image
RICOH KK52 citations91
US5162859ANov 10, 1992
Image forming apparatus capable of creating duplex mixed full color and black/white copies and delivering copy sets on page-sequential order
RICOH KK21 citations81
US4677310AJun 30, 1987
Power supply control device for copier having timer
RICOH KK24 citations80
US5142339AAug 25, 1992
Image recorder with variable fuser nip entry position
RICOH KK12 citations73
US4799081AJan 17, 1989
Copying system having copying and service program modes
RICOH KK15 citations73
US7062185B2Jun 13, 2006
Image forming apparatus, image processing unit, and image forming method to keep image quality precision of both sides of recording medium, and computer product
RICOH KK8 citations69
US7016636B2Mar 21, 2006
Double-sided image forming apparatus and method
RICOH KK0 citations38
US7787157B2Aug 31, 2010
Image reading apparatus, image reading method and image processing apparatus
RICOH KK0 citations37