Inventor · disambiguated record
Hisao Murayama
Also filed as: MURAYAMA HISAO
21 granted patents·535 citations·filing 1983–2007
96Inventor score
Files withRICOH KK21
Top patents by PatentIndex Score
21 records- 0197US5493382AImage forming apparatus with toner recycling deviceRICOH KK·Filed 1993·Granted Feb 20, 1996·84 cites·12 claims
- 0294US5737680AImage forming apparatus with toner recycling deviceRICOH KK·Filed 1996·Granted Apr 7, 1998·59 cites·8 claims
- 0394US5008711AImage forming apparatusRICOH KK·Filed 1988·Granted Apr 16, 1991·49 cites·9 claims
- 0493US5475476AImage density control method for an image recorderRICOH KK·Filed 1993·Granted Dec 12, 1995·44 cites·12 claims
- 0590US5604575AImage forming apparatus with toner recycling deviceRICOH KK·Filed 1995·Granted Feb 18, 1997·41 cites·6 claims
- 0690US5541029AMulticolor image forming method preventing mixing of colorsRICOH KK·Filed 1994·Granted Jul 30, 1996·38 cites·9 claims
- 0790US5438401AMulticolor image forming method and apparatus thereforRICOH KK·Filed 1994·Granted Aug 1, 1995·41 cites·21 claims
- 0885US5231452AImage forming control method using variable state factors and fuzzy computationRICOH KK·Filed 1992·Granted Jul 27, 1993·31 cites·7 claims
- 0984US7321742B2Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drumRICOH KK·Filed 2006·Granted Jan 22, 2008·8 cites·17 claims
- 1082US5682572AImage density control method for an image recorderRICOH KK·Filed 1995·Granted Oct 28, 1997·27 cites·16 claims
- 1180US5869213AMulticolor image forming method preventing contamination of toner on an image carrier with toner on a developing carrierRICOH KK·Filed 1994·Granted Feb 9, 1999·23 cites·5 claims
- 1277US7295795B2Image forming apparatus and an impurity collecting device associated with registration rollersRICOH KK·Filed 2005·Granted Nov 13, 2007·4 cites·1 claims
- 1377US7010246B2Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drumRICOH KK·Filed 2003·Granted Mar 7, 2006·13 cites·14 claims
- 1475US7003251B2Image forming method having transfer temperature difference and apparatus for the sameRICOH KK·Filed 2003·Granted Feb 21, 2006·12 cites·21 claims
- 1575US4931374AElectrophotographic positive charging toner containing a copper phthalocyanine blue pigmentRICOH KK·Filed 1985·Granted Jun 5, 1990·19 cites·8 claims
- 1671US6983117B2Image forming apparatus configured for double sided printingRICOH KK·Filed 2003·Granted Jan 3, 2006·12 cites·55 claims
- 1766US6898398B2Apparatus for image forming on both sides of a recording medium and image forming method, and image carrier for the sameRICOH KK·Filed 2003·Granted May 24, 2005·9 cites·16 claims
- 1865US7548712B2Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drumRICOH KK·Filed 2007·Granted Jun 16, 2009·2 cites·39 claims
- 1954US7197269B2Method, system and apparatus for transferring toner images to both sides of a recording mediumRICOH KK·Filed 2003·Granted Mar 27, 2007·5 cites·19 claims
- 2051US5258813ADeveloping device for a multicolor image forming apparatus having a toner particle size distribution which prevents mixture of toners of different colorsRICOH KK·Filed 1992·Granted Nov 2, 1993·8 cites·4 claims
- 2147US4554233AElectrophotographic toner containing triazolium compound as charge controlling agentRICOH KK·Filed 1983·Granted Nov 19, 1985·6 cites·15 claims
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