Inventor
UMEDA MINORU
JP13 patents
⚠️ This page may combine multiple inventors who share the name “UMEDA MINORU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
8 patentsUS6521386B1Feb 18, 2003
Electrophotographic photoreceptor and electrophotographic image forming method and apparatus using the photoreceptor
RICOH KK60 citations96
US5677094AOct 14, 1997
Electrophotographic photoconductor
RICOH KK53 citations96
US5547790AAug 20, 1996
Electrophotographic photoconductor containing polymeric charge transporting material in charge generating and transporting layers
RICOH KK47 citations96
US5804343ASep 8, 1998
Electrophotographic photoconductor
RICOH KK35 citations92
US4863822ASep 5, 1989
Electrophotographic photoconductor comprising charge generating and transport layers containing adjuvants
RICOH KK24 citations91
US4822705AApr 18, 1989
Electrophotographic photoconductor with layer preventing charge injection
RICOH KK24 citations91
US6590696B2Jul 8, 2003
Image display medium and image display device using the image display medium
RICOH KK8 citations73
US5749029AMay 5, 1998
Electrophotographic process and apparatus therefor
RICOH KK9 citations73