Inventor
UMEHARA MASAAKIRA
JP16 patents
Patents
16 patentsUS4656121AApr 7, 1987
Optical information recording medium
RICOH KK81 citations96
US4465767AAug 14, 1984
Optical information recording medium
RICOH KK68 citations95
US4460665AJul 17, 1984
Optical information recording medium
RICOH KK51 citations95
US4162843AJul 31, 1979
Color electrostatic copying machine
RICOH KK65 citations94
US5196250AMar 23, 1993
Optical information recording medium
RICOH KK33 citations92
US4891305AJan 2, 1990
Optical information recording element
RICOH KK35 citations92
US4714667ADec 22, 1987
Optical information recording medium
RICOH KK33 citations92
US4767693AAug 30, 1988
Optical information recording medium
RICOH KK53 citations90
US5002812AMar 26, 1991
Optical information recording medium, information recording method and optical information recording system using the medium
RICOH KK38 citations89
US4614705ASep 30, 1986
Optical information recording medium
RICOH KK22 citations82
US4758499AJul 19, 1988
Optical information recording medium
RICOH KK16 citations73
US4707431ANov 17, 1987
Optical information recording medium
RICOH KK15 citations73
US4696892ASep 29, 1987
Optical information recording medium
RICOH KK18 citations73
US4477555AOct 16, 1984
Optical information recording medium
RICOH KK13 citations73
US4332884AJun 1, 1982
Photo-sensitive and heat-sensitive composition and recording element using same
RICOH KK8 citations72
US4315068AFeb 9, 1982
Photo-sensitive and heat-sensitive composition and recording element using same
RICOH KK9 citations72