Inventor · disambiguated record
Kayoko Yokoyama
Also filed as: YOKOYAMA KAYOKO
4 granted patents·74 citations·filing 1988–1989
78Inventor score
Technology areasG03G
Files withRICOH KK4
Top patents by PatentIndex Score
4 records- 0181US4863822AElectrophotographic photoconductor comprising charge generating and transport layers containing adjuvantsRICOH KK·Filed 1988·Granted Sep 5, 1989·24 cites·31 claims
- 0280US4822705AElectrophotographic photoconductor with layer preventing charge injectionRICOH KK·Filed 1988·Granted Apr 18, 1989·24 cites·10 claims
- 0374US4906545AElectrophotographic photoconductor with undercoat layer containing metal oxide on supportRICOH KK·Filed 1988·Granted Mar 6, 1990·18 cites·15 claims
- 0451US4970131AElectrophotographic photoconductor having overcoat layerRICOH KK·Filed 1989·Granted Nov 13, 1990·8 cites·45 claims
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