Inventor · disambiguated record
Hajime Oyama
Also filed as: OYAMA HAJIME · SHIMIZU KAORU · YANAGAWA NOBUYUKI
121 granted patents·8 pending applications·1,927 citations·filing 1976–2024
99Inventor score
Top patents by PatentIndex Score
129 records- 0198US7171145B2Developing device and process cartridge for an image forming apparatusRICOH KK·Filed 2006·Granted Jan 30, 2007·44 cites·12 claims
- 0298US6505014B2Image forming apparatus and an image forming process unitRICOH KK·Filed 2001·Granted Jan 7, 2003·116 cites·38 claims
- 0397US6721516B2Image forming apparatusRICOH KK·Filed 2002·Granted Apr 13, 2004·85 cites·79 claims
- 0497US4194830ADevelopment apparatusRICOH KK·Filed 1978·Granted Mar 25, 1980·54 cites·9 claims
- 0596US11993292B2Automatic driving control apparatus for vehicle based on driving skill of driverSUBARU CORP·Filed 2020·Granted May 28, 2024·4 cites·16 claims
- 0696US11498584B2Intersection start judgment deviceSUBARU CORP·Filed 2020·Granted Nov 15, 2022·4 cites·4 claims
- 0796US6611672B2Image forming apparatus, monocolor image forming apparatus, toner recycling apparatus and intermediate transfer memberRICOH KK·Filed 2001·Granted Aug 26, 2003·90 cites·58 claims
- 0895US7209685B2Developing device, image forming apparatus and process cartridge including replenishment openingsRICOH KK·Filed 2005·Granted Apr 24, 2007·19 cites·17 claims
- 0995US6658227B2Development method apparatus, image formation and process cartridge for suppressing variation in toner chargeRICOH KK·Filed 2002·Granted Dec 2, 2003·63 cites·26 claims
- 1095US5805965ADeveloping device for an image forming apparatus having developer distribution featuresRICOH KK·Filed 1996·Granted Sep 8, 1998·83 cites·41 claims
- 1194US12103568B2Vehicle driving support system, server apparatus for the vehicle driving support system, and vehicle for the vehicle driving support systemSUBARU CORP·Filed 2021·Granted Oct 1, 2024·2 cites·16 claims
- 1294US9809164B2Travel control apparatus for vehicleSUBARU CORP·Filed 2015·Granted Nov 7, 2017·22 cites·15 claims
- 1394US5659860ADeveloping device for an image forming apparatus and toner cartridgeRICOH KK·Filed 1995·Granted Aug 19, 1997·84 cites·20 claims
- 1494US4286543AApparatus for developing electrostatic imageRICOH KK·Filed 1979·Granted Sep 1, 1981·43 cites·13 claims
- 1593US7890231B2Lane keeping assistance equipment for automotive vehiclesFUJI HEAVY IND LTD·Filed 2007·Granted Feb 15, 2011·34 cites·19 claims
- 1693US5771426ADeveloping device using a toner and carrier mixtureRICOH KK·Filed 1996·Granted Jun 23, 1998·67 cites·40 claims
- 1793US5198861AImage density control method for an image forming apparatus for reducing background contamination of a photoconductive drumRICOH KK·Filed 1992·Granted Mar 30, 1993·57 cites·9 claims
- 1893US4382420ADevelopment apparatusRICOH KK·Filed 1981·Granted May 10, 1983·42 cites·25 claims
- 1992US10891854B2Traffic management systemSUBARU CORP·Filed 2020·Granted Jan 12, 2021·3 cites·13 claims
- 2092US9764640B2Travel control apparatus for vehicleSUBARU CORP·Filed 2015·Granted Sep 19, 2017·12 cites·15 claims
- 2191US7480475B2Developing device, and image forming apparatus and process cartridge using the developing deviceRICOH KK·Filed 2006·Granted Jan 20, 2009·13 cites·9 claims
- 2291US5758241ADeveloping device for an image forming apparatusRICOH KK·Filed 1996·Granted May 26, 1998·56 cites·25 claims
- 2391US5083160AImage density control method and color image forming apparatusRICOH KK·Filed 1990·Granted Jan 21, 1992·49 cites·6 claims
- 2490US5822664ADeveloping machine which uses a developing agent including a toner and magnetic particlesRICOH KK·Filed 1995·Granted Oct 13, 1998·51 cites·12 claims
- 2589US7035575B2Developing device, image forming apparatus, and process cartridgeRICOH KK·Filed 2004·Granted Apr 25, 2006·35 cites·27 claims
- 2689US5182600AToner end detecting method for an electrophotographic copierRICOH KK·Filed 1991·Granted Jan 26, 1993·43 cites·8 claims
- 2789US4406536ADeveloping deviceRICOH KK·Filed 1982·Granted Sep 27, 1983·33 cites·27 claims
- 2888US12027039B2Mobility information provision system, server, and vehicleSUBARU CORP·Filed 2020·Granted Jul 2, 2024·2 cites·6 claims
- 2988US11465646B2Vehicle traveling control apparatusSUBARU CORP·Filed 2020·Granted Oct 11, 2022·2 cites·9 claims
- 3088US6463244B2Image forming apparatus, developing device therefor and image forming process unitRICOH KK·Filed 2001·Granted Oct 8, 2002·30 cites·23 claims
- 3187US10946856B2Vehicle drive systemMAZDA MOTOR·Filed 2019·Granted Mar 16, 2021·6 cites·6 claims
- 3287US9637107B2Travel control apparatus for vehicleFUJI HEAVY IND LTD·Filed 2015·Granted May 2, 2017·7 cites·16 claims
- 3387US7181155B2Developer supplying device, developing roller, developing device, image forming apparatus and process cartridgeRICOH KK·Filed 2005·Granted Feb 20, 2007·9 cites·25 claims
- 3487US6901233B2Image forming apparatusRICOH KK·Filed 2003·Granted May 31, 2005·23 cites·13 claims
- 3587US5771429ADeveloping device capable of automatic toner content controlRICOH KK·Filed 1996·Granted Jun 23, 1998·42 cites·30 claims
- 3687US5450177AImage forming apparatus having a toner concentration control capability with a toner concentration sensor disposed in a developing unitRICOH KK·Filed 1994·Granted Sep 12, 1995·35 cites·16 claims
- 3787US4165393AMagnetic brush developing process for electrostatic imagesRICOH KK·Filed 1976·Granted Aug 21, 1979·26 cites·6 claims
- 3886US12151681B2Vehicle driving control systemSUBARU CORP·Filed 2021·Granted Nov 26, 2024·1 cites·8 claims
- 3986US11335195B2Traffic control systemSUBARU CORP·Filed 2020·Granted May 17, 2022·2 cites·11 claims
- 4086US5864733ADeveloping device for image forming apparatusRICOH KK·Filed 1996·Granted Jan 26, 1999·44 cites·10 claims
- 4185US9889884B2Travel control apparatus for vehicleSUBARU CORP·Filed 2015·Granted Feb 13, 2018·6 cites·14 claims
- 4285US9776641B2Travel control apparatus for vehicleSUBARU CORP·Filed 2015·Granted Oct 3, 2017·6 cites·20 claims
- 4385US6526248B1Toner support member and developing device prevented from charging toner by frictionRICOH KK·Filed 2000·Granted Feb 25, 2003·24 cites·25 claims
- 4484US8611609B2Lane line estimating apparatusOYAMA HAJIME·Filed 2011·Granted Dec 17, 2013·13 cites·15 claims
- 4584US4193679AElectrophotographic apparatus comprising improved imaging systemRICOH KK·Filed 1977·Granted Mar 18, 1980·22 cites·5 claims
- 4683US10604139B2Drive assist apparatus for vehicleSUBARU CORP·Filed 2018·Granted Mar 31, 2020·4 cites·18 claims
- 4783US9493163B2Driving support apparatus for vehicleFUJI HEAVY IND LTD·Filed 2015·Granted Nov 15, 2016·5 cites·12 claims
- 4882US6983818B2Steering control apparatusFUJI HEAVY IND LTD·Filed 2005·Granted Jan 10, 2006·14 cites·6 claims
- 4981US8311729B2Traffic lane deviation preventing system for a vehicleSAITO TORU·Filed 2007·Granted Nov 13, 2012·18 cites·23 claims
- 5081US4989043AColor-balance control methodRICOH KK·Filed 1989·Granted Jan 29, 1991·25 cites·3 claims
Showing the top 50 of 129 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →