Inventor · disambiguated record
Masaakira Umehara
Also filed as: INOUE SATORU · UMEHARA MASAAKIRA
16 granted patents·558 citations·filing 1977–1991
95Inventor score
Files withRICOH KK16
Top patents by PatentIndex Score
16 records- 0196US4465767AOptical information recording mediumRICOH KK·Filed 1982·Granted Aug 14, 1984·68 cites·16 claims
- 0295US4162843AColor electrostatic copying machineRICOH KK·Filed 1977·Granted Jul 31, 1979·65 cites·13 claims
- 0394US4460665AOptical information recording mediumRICOH KK·Filed 1982·Granted Jul 17, 1984·51 cites·17 claims
- 0492US4891305AOptical information recording elementRICOH KK·Filed 1988·Granted Jan 2, 1990·35 cites·15 claims
- 0591US4656121AOptical information recording mediumRICOH KK·Filed 1985·Granted Apr 7, 1987·81 cites·18 claims
- 0690US4767693AOptical information recording mediumRICOH KK·Filed 1987·Granted Aug 30, 1988·53 cites·64 claims
- 0786US5002812AOptical information recording medium, information recording method and optical information recording system using the mediumRICOH KK·Filed 1989·Granted Mar 26, 1991·38 cites·17 claims
- 0883US5196250AOptical information recording mediumRICOH KK·Filed 1991·Granted Mar 23, 1993·33 cites·21 claims
- 0977US4614705AOptical information recording mediumRICOH KK·Filed 1985·Granted Sep 30, 1986·22 cites·19 claims
- 1073US4714667AOptical information recording mediumRICOH KK·Filed 1985·Granted Dec 22, 1987·33 cites·9 claims
- 1172US4696892AOptical information recording mediumRICOH KK·Filed 1985·Granted Sep 29, 1987·18 cites·14 claims
- 1269US4758499AOptical information recording mediumRICOH KK·Filed 1986·Granted Jul 19, 1988·16 cites·9 claims
- 1368US4707431AOptical information recording mediumRICOH KK·Filed 1985·Granted Nov 17, 1987·15 cites·2 claims
- 1466US4477555AOptical information recording mediumRICOH KK·Filed 1982·Granted Oct 16, 1984·13 cites·13 claims
- 1543US4315068APhoto-sensitive and heat-sensitive composition and recording element using sameRICOH KK·Filed 1981·Granted Feb 9, 1982·9 cites·48 claims
- 1641US4332884APhoto-sensitive and heat-sensitive composition and recording element using sameRICOH KK·Filed 1980·Granted Jun 1, 1982·8 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →