Inventor · disambiguated record
Iwao Matsumae
Also filed as: MATSUMAE IWAO
24 granted patents·1,134 citations·filing 1994–2007
97Inventor score
Top patents by PatentIndex Score
24 records- 0196US5617191AToner conveyor roller and image forming apparatus having the sameRICOH KK·Filed 1995·Granted Apr 1, 1997·84 cites·11 claims
- 0295US6033818ADeveloping device for an image forming apparatusRICOH KK·Filed 1998·Granted Mar 7, 2000·53 cites·9 claims
- 0395US5845183ADeveloping device for an image forming apparatusRICOH KK·Filed 1997·Granted Dec 1, 1998·52 cites·9 claims
- 0495US5708942ADeveloping device for an image forming apparatusRICOH KK·Filed 1996·Granted Jan 13, 1998·53 cites·4 claims
- 0595US5625441ADeveloping device for an image forming apparatusRICOH KK·Filed 1996·Granted Apr 29, 1997·54 cites·9 claims
- 0694US5826144ADeveloping device for an electrophotographic recording apparatus including bias control of a toner supplying rollerRICOH KK·Filed 1996·Granted Oct 20, 1998·68 cites·7 claims
- 0794US5489747ADeveloping device for an image forming apparatusRICOH KK·Filed 1995·Granted Feb 6, 1996·73 cites·3 claims
- 0893US5697026ADeveloping device having the lengths of two toner transporting rollers and an image bearing member in specific relationshipsRICOH KK·Filed 1995·Granted Dec 9, 1997·62 cites·19 claims
- 0993US5625440ADeveloping device having seals between a toner transport roller and the toner hopper which prevent toner leakage and scatteringRICOH KK·Filed 1995·Granted Apr 29, 1997·64 cites·9 claims
- 1092US5768665AImage forming apparatus with bias control to prevent undesirable toner depositionRICOH KK·Filed 1996·Granted Jun 16, 1998·58 cites·14 claims
- 1192US5666625ADevice for electrostatically developing a latent image on an image carrierRICOH KK·Filed 1995·Granted Sep 9, 1997·62 cites·4 claims
- 1291US5879752AMethod of coating a toner conveyor rollerRICOH KK·Filed 1996·Granted Mar 9, 1999·62 cites·18 claims
- 1391US5689782ADeveloping apparatus for electronic photographic recording equipment, having two developer transfer rollersRICOH KK·Filed 1995·Granted Nov 18, 1997·64 cites·10 claims
- 1491US5625438AToner, and devices for electrostatically depositing a uniform application thereofRICOH KK·Filed 1995·Granted Apr 29, 1997·40 cites·8 claims
- 1591US5486909ADeveloping device for an image forming apparatusRICOH KK·Filed 1995·Granted Jan 23, 1996·56 cites·2 claims
- 1690US7436425B2Optical writing apparatus and image forming apparatusRICOH KK·Filed 2005·Granted Oct 14, 2008·15 cites·9 claims
- 1790US5627630ADeveloping apparatus having a toner supporting roller with an inner layer and surface layerRICOH KK·Filed 1995·Granted May 6, 1997·48 cites·22 claims
- 1890US5552870ADeveloping device for an image forming apparatusRICOH KK·Filed 1994·Granted Sep 3, 1996·39 cites·17 claims
- 1989US5863036ASheet feeding device and image forming apparatus having the sameRICOH KK·Filed 1996·Granted Jan 26, 1999·45 cites·15 claims
- 2087US5819145AImage forming device for forming a uniform toner layer on a developing rollerRICOH KK·Filed 1996·Granted Oct 6, 1998·41 cites·32 claims
- 2184US7697184B2Optical scanning device and image forming apparatusRICOH KK·Filed 2007·Granted Apr 13, 2010·13 cites·18 claims
- 2283US7916161B2Image forming apparatusRICOH CO LTD·Filed 2007·Granted Mar 29, 2011·8 cites·13 claims
- 2372US7589756B2Optical scanning device, image forming apparatus, optical scanning correcting method, and image forming methodRICOH KK·Filed 2006·Granted Sep 15, 2009·4 cites·14 claims
- 2469US5610693ADeveloping device for an image forming apparatusRICOH KK·Filed 1994·Granted Mar 11, 1997·16 cites·35 claims
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