Inventor
MATSUMAE IWAO
JP24 patents
⚠️ This page may combine multiple inventors who share the name “MATSUMAE IWAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
23 patentsUS6033818AMar 7, 2000
Developing device for an image forming apparatus
RICOH KK53 citations96
US5879752AMar 9, 1999
Method of coating a toner conveyor roller
RICOH KK62 citations96
US5845183ADec 1, 1998
Developing device for an image forming apparatus
RICOH KK52 citations96
US5826144AOct 20, 1998
Developing device for an electrophotographic recording apparatus including bias control of a toner supplying roller
RICOH KK68 citations96
US5768665AJun 16, 1998
Image forming apparatus with bias control to prevent undesirable toner deposition
RICOH KK58 citations96
US5708942AJan 13, 1998
Developing device for an image forming apparatus
RICOH KK53 citations96
US5697026ADec 9, 1997
Developing device having the lengths of two toner transporting rollers and an image bearing member in specific relationships
RICOH KK62 citations96
US5625440AApr 29, 1997
Developing device having seals between a toner transport roller and the toner hopper which prevent toner leakage and scattering
RICOH KK64 citations96
US5625441AApr 29, 1997
Developing device for an image forming apparatus
RICOH KK54 citations96
US5625438AApr 29, 1997
Toner, and devices for electrostatically depositing a uniform application thereof
RICOH KK40 citations96
US5617191AApr 1, 1997
Toner conveyor roller and image forming apparatus having the same
RICOH KK84 citations96
US5489747AFeb 6, 1996
Developing device for an image forming apparatus
RICOH KK73 citations96
US5486909AJan 23, 1996
Developing device for an image forming apparatus
RICOH KK56 citations96
US5666625ASep 9, 1997
Device for electrostatically developing a latent image on an image carrier
RICOH KK62 citations95
US5689782ANov 18, 1997
Developing apparatus for electronic photographic recording equipment, having two developer transfer rollers
RICOH KK64 citations94
US5819145AOct 6, 1998
Image forming device for forming a uniform toner layer on a developing roller
RICOH KK41 citations93
US5627630AMay 6, 1997
Developing apparatus having a toner supporting roller with an inner layer and surface layer
RICOH KK48 citations93
US5863036AJan 26, 1999
Sheet feeding device and image forming apparatus having the same
RICOH KK45 citations92
US5552870ASep 3, 1996
Developing device for an image forming apparatus
RICOH KK39 citations92
US7697184B2Apr 13, 2010
Optical scanning device and image forming apparatus
RICOH KK13 citations84
US7436425B2Oct 14, 2008
Optical writing apparatus and image forming apparatus
RICOH KK15 citations84
US5610693AMar 11, 1997
Developing device for an image forming apparatus
RICOH KK16 citations74
US7589756B2Sep 15, 2009
Optical scanning device, image forming apparatus, optical scanning correcting method, and image forming method
RICOH KK4 citations63