Inventor
OHORI MAYUMI
JP10 patents
Patents
10 patentsUS6266501B1Jul 24, 2001
Image-forming apparatus having a seal for a developer and a method for detecting a removal of the seal
RICOH KK90 citations98
US6085062AJul 4, 2000
Electrophotographic image forming apparatus
RICOH KK100 citations97
US6628903B1Sep 30, 2003
Image forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paper
RICOH KK52 citations96
US6148161ANov 14, 2000
Image forming apparatus with improved toner density control
RICOH KK64 citations96
US6144811ANov 7, 2000
Image forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paper
RICOH KK70 citations96
US6144822ANov 7, 2000
Image forming apparatus having detachable transfer roller and discharge device
RICOH KK63 citations96
US6160969ADec 12, 2000
Image forming apparatus with a voltage applying unit for image transfer
RICOH KK57 citations95
US6128449AOct 3, 2000
Image forming apparatus and method for controlling charging and developing bias voltage
RICOH KK72 citations95
US6898383B2May 24, 2005
Image forming apparatus
RICOH KK19 citations92
US5915143AJun 22, 1999
Image forming apparatus and method for automatically adjusting toner density in response to humidity variations
RICOH KK55 citations92