Inventor · disambiguated record
Masumi Sato
Also filed as: SATO MASUMI
57 granted patents·2,209 citations·filing 1990–2009
99Inventor score
Top patents by PatentIndex Score
57 records- 0199US6628908B2Toner supply unit and image forming apparatusRICOH KK·Filed 2001·Granted Sep 30, 2003·175 cites·19 claims
- 0299US6591077B2Image forming apparatus and toner container thereforRICOH KK·Filed 2001·Granted Jul 8, 2003·143 cites·24 claims
- 0399US6507720B2Color image forming apparatus and toner replenishing apparatus each including plural toner containers received in receiving member of setting part and toner containers thereforRICOH KK·Filed 2001·Granted Jan 14, 2003·209 cites·34 claims
- 0499US6393241B1Nozzle having an end portion capable of penetrating into a toner discharging portion included in a toner container that stores powdery tonerRICOH KK·Filed 2000·Granted May 21, 2002·181 cites·53 claims
- 0598US7130558B2Toner supply unit and image forming apparatusRICOH KK·Filed 2005·Granted Oct 31, 2006·32 cites·62 claims
- 0698US6567637B2Apparatus and method for replenishing a developing device with toner while suppressing toner remainingRICOH KK·Filed 2001·Granted May 20, 2003·105 cites·28 claims
- 0798US6505022B2Image forming apparatus having protective layer on the surface of image bearing member to avoid adhesion of film of additives to image bearing memberRICOH KK·Filed 2001·Granted Jan 7, 2003·110 cites·40 claims
- 0898US6501913B2Container, its support structure, and image formation apparatusRICOH KK·Filed 2001·Granted Dec 31, 2002·100 cites·10 claims
- 0997US6898407B2Desktop color image forming apparatus and method of making the sameRICOH KK·Filed 2003·Granted May 24, 2005·61 cites·56 claims
- 1097US5400123AImage forming apparatus capable of erasing an image recorded in a sheetRICOH KK·Filed 1993·Granted Mar 21, 1995·102 cites·29 claims
- 1195US7263309B2Desktop color image forming apparatus and method of making the sameRICOH KK·Filed 2005·Granted Aug 28, 2007·15 cites·26 claims
- 1295US6546219B2Method and apparatus for performing a charging process on an image carrying deviceRICOH KK·Filed 2001·Granted Apr 8, 2003·70 cites·22 claims
- 1395US5878317AElectrophotographic method and apparatus including a toner recycle featureRICOH KK·Filed 1997·Granted Mar 2, 1999·85 cites·21 claims
- 1494US6748190B2Apparatus and method for replenishing a developing device with toner while suppressing toner remainingRICOH KK·Filed 2003·Granted Jun 8, 2004·42 cites·28 claims
- 1594US6567643B2Apparatuses for color image formation, tandem color image formation and image formationRICOH KK·Filed 2001·Granted May 20, 2003·38 cites·7 claims
- 1694US5799229AToner spreading device for a charging roller of an image forming apparatusRICOH KK·Filed 1997·Granted Aug 25, 1998·69 cites·48 claims
- 1793US7333749B2Desktop color image forming apparatus and method of making the sameRICOH KK·Filed 2007·Granted Feb 19, 2008·10 cites·32 claims
- 1893US6470161B2Apparatus for minimizing toner contamination on an image formation memberRICOH KK·Filed 2001·Granted Oct 22, 2002·65 cites·26 claims
- 1993US6334039B1Method and apparatus for image forming apparatus capable of accurately detecting toner image patternsRICOH KK·Filed 2000·Granted Dec 25, 2001·51 cites·26 claims
- 2092US7356290B2Toner supply unit and image forming apparatusRICOH KK·Filed 2006·Granted Apr 8, 2008·9 cites·34 claims
- 2192US6519428B1Image forming apparatus having mixed toner consumption modeRICOH KK·Filed 2000·Granted Feb 11, 2003·44 cites·24 claims
- 2291US7289748B2Apparatus and method for replenishing a developing device with toner while suppressing toner remainingRICOH KK·Filed 2005·Granted Oct 30, 2007·10 cites·14 claims
- 2391US6366754B1Color image forming apparatus with toner recyclingRICOH KK·Filed 2000·Granted Apr 2, 2002·44 cites·32 claims
- 2491US5946529AImage forming apparatus using a roller type charging systemRICOH KK·Filed 1997·Granted Aug 31, 1999·53 cites·12 claims
- 2590US7542697B2Toner supply unit and image forming apparatusRICOH KK·Filed 2008·Granted Jun 2, 2009·7 cites·20 claims
- 2690US6719469B2Ink jet recording apparatus capable of performing a duplex print operationRICOH KK·Filed 2002·Granted Apr 13, 2004·33 cites·19 claims
- 2790US5659843AImage transferring device for image forming equipmentRICOH KK·Filed 1995·Granted Aug 19, 1997·61 cites·17 claims
- 2889US7209689B2Toner supply unit and image forming apparatusRICOH KK·Filed 2003·Granted Apr 24, 2007·20 cites·111 claims
- 2988US6973283B2Color image forming apparatus, and toner replenishing apparatusRICOH KK·Filed 2001·Granted Dec 6, 2005·20 cites·21 claims
- 3086US6778797B2Charging roller having elastic memberRICOH KK·Filed 2001·Granted Aug 17, 2004·26 cites·52 claims
- 3183US7088945B2Toner supply unit and image forming apparatusRICOH KK·Filed 2004·Granted Aug 8, 2006·13 cites·60 claims
- 3281US7344615B2Method and apparatus for performing a charging process on an image carrying deviceRICOH KK·Filed 2005·Granted Mar 18, 2008·5 cites·6 claims
- 3379US6801749B2Apparatuses for color image formation, tandem color image formation and image formationRICOH KK·Filed 2003·Granted Oct 5, 2004·12 cites·20 claims
- 3478US7406283B2Desktop color image forming apparatus and method of making the sameRICOH KK·Filed 2007·Granted Jul 29, 2008·3 cites·9 claims
- 3577US7606521B2Desktop color image forming apparatus and method of making the sameRICOH KK·Filed 2008·Granted Oct 20, 2009·3 cites·19 claims
- 3676US6416176B1Ink-jet printing system having an improved sheet transport mechanismRICOH KK·Filed 1999·Granted Jul 9, 2002·33 cites·9 claims
- 3775US7218880B2Apparatus and method for replenishing a developing device with toner while suppressing toner remainingRICOH KK·Filed 2004·Granted May 15, 2007·10 cites·18 claims
- 3874US6263175B1Image forming apparatus including a charging device with a cleaning memberRICOH KK·Filed 1999·Granted Jul 17, 2001·22 cites·54 claims
- 3972US7436417B2Color image forming apparatus, and toner replenishing apparatusRICOH KK·Filed 2006·Granted Oct 14, 2008·2 cites·21 claims
- 4071US6977022B2Method and apparatus for performing a charging process on an image carrying deviceRICOH KK·Filed 2002·Granted Dec 20, 2005·11 cites·1 claims
- 4169US7712989B2Ink jet recording apparatus capable of performing a duplex print operationRICOH KK·Filed 2005·Granted May 11, 2010·2 cites·12 claims
- 4269US7212764B2Color image forming apparatus, and toner replenishing apparatusRICOH KK·Filed 2004·Granted May 1, 2007·7 cites·40 claims
- 4365US5144337AImage forming apparatus capable of forming an image by dots having various diametersRICOH KK·Filed 1990·Granted Sep 1, 1992·27 cites·5 claims
- 4462US6507354B1Image forming apparatus with a writing laser power controlRICOH KK·Filed 2000·Granted Jan 14, 2003·4 cites·6 claims
- 4562US5719684AImage forming apparatus having an endless conveying and transferring belt with an interrupt controlRICOH KK·Filed 1996·Granted Feb 17, 1998·26 cites·26 claims
- 4661US8180246B2Image forming apparatusKAWAHARA SHINICHI·Filed 2009·Granted May 15, 2012·2 cites·10 claims
- 4761US6785504B2Apparatuses for color image formation, tandem color image formation and image formationRICOH KK·Filed 2003·Granted Aug 31, 2004·5 cites·5 claims
- 4859US5296877AMulticolor image forming method and apparatus thereforRICOH KK·Filed 1992·Granted Mar 22, 1994·12 cites·4 claims
- 4958US7344326B2Ink jet recording apparatus capable of performing a duplex print operationRICOH KK·Filed 2004·Granted Mar 18, 2008·5 cites·14 claims
- 5057US6766137B2Apparatuses for color image formation, tandem color image formation and image formationRICOH KK·Filed 2003·Granted Jul 20, 2004·4 cites·6 claims
Showing the top 50 of 57 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Masumi Sato files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →