Inventor · disambiguated record
Masaaki Ishida
Also filed as: ISHIDA MASAAKI
95 granted patents·14 pending applications·1,691 citations·filing 1983–2023
99Inventor score
Top patents by PatentIndex Score
109 records- 0197US7701480B2Light-source driving device, optical scanning device, and image forming apparatusRICOH KK·Filed 2008·Granted Apr 20, 2010·34 cites·8 claims
- 0296US7327379B2Pixel clock and pulse-modulation-signal generating device, optical scanner, and image forming apparatusRICOH KK·Filed 2005·Granted Feb 5, 2008·36 cites·4 claims
- 0396US6498617B1Pulse width modulation circuit, optical write unit, image forming apparatus and optical write methodRICOH KK·Filed 2000·Granted Dec 24, 2002·159 cites·26 claims
- 0495US7271824B2Pixel clock generating apparatus, optical writing apparatus using a pixel clock, imaging apparatus, and method for generating pixel clocksRICOH KK·Filed 2002·Granted Sep 18, 2007·83 cites·35 claims
- 0595US6933957B2Pixel clock generation apparatus, pixel clock generation method, and image forming apparatus capable of correcting main scan dot position shift with a high degree of accuracyRICOH KK·Filed 2003·Granted Aug 23, 2005·63 cites·46 claims
- 0695US6917639B2Laser driver circuitRICOH KK·Filed 2002·Granted Jul 12, 2005·61 cites·31 claims
- 0795US6731317B2Pulse modulation signal generation circuit, and semiconductor laser modulation device, optical scanning device and image formation device using the sameRICOH KK·Filed 2002·Granted May 4, 2004·84 cites·47 claims
- 0894US8982422B2Method and apparatus for forming images, and method for producing printed productsIWATA MUNEAKI·Filed 2014·Granted Mar 17, 2015·10 cites·12 claims
- 0994US8237760B2Light-source driving device, optical scanning device, and counting methodNIHEI YASUHIRO·Filed 2009·Granted Aug 7, 2012·20 cites·15 claims
- 1094US7256815B2Image forming method, image forming apparatus, optical scan device, and image forming apparatus using the sameRICOH KK·Filed 2002·Granted Aug 14, 2007·58 cites·38 claims
- 1193US7463278B2Pixel clock generation circuitRICOH KK·Filed 2005·Granted Dec 9, 2008·23 cites·17 claims
- 1293US7283151B2Pixel clock generation device causing state transition of pixel clock according to detected state transition and phase data indicating phase shift amountRICOH KK·Filed 2003·Granted Oct 16, 2007·81 cites·40 claims
- 1392US6791596B2Method and apparatus for image forming capable of effectively generating pixel clock pulsesRICOH KK·Filed 2002·Granted Sep 14, 2004·84 cites·101 claims
- 1491US8896648B2Laser driving unit and image forming apparatusOMORI ATSUFUMI·Filed 2011·Granted Nov 25, 2014·7 cites·25 claims
- 1591US7515170B2Optical scanner and image forming apparatusRICOH KK·Filed 2006·Granted Apr 7, 2009·15 cites·15 claims
- 1691US6927789B2Pixel clock generating device, laser scanning device, and image forming deviceRICOH KK·Filed 2003·Granted Aug 9, 2005·52 cites·12 claims
- 1791US5946334ASemiconductor laser control systemRICOH KK·Filed 1997·Granted Aug 31, 1999·85 cites·106 claims
- 1891US5816088ASurface treatment method for a steel workpiece using high speed shot peeningSUNCALL CORP·Filed 1997·Granted Oct 6, 1998·45 cites·13 claims
- 1990US7528625B2Image forming apparatusRICOH KK·Filed 2005·Granted May 5, 2009·22 cites·31 claims
- 2089US8310516B2Light scanning apparatus, light scanning method, image forming apparatus, color image forming apparatus, and recording medium having programTANABE JUN·Filed 2006·Granted Nov 13, 2012·11 cites·15 claims
- 2189US7826110B2Light scanning apparatus, light scanning method, image forming apparatus, and color image forming apparatusRICOH KK·Filed 2007·Granted Nov 2, 2010·12 cites·20 claims
- 2288US5784091AImage forming system using digital ASIC and analog ASIC for processing image data and controlling semiconductor laser, and half-tone pixel representing methodRICOH KK·Filed 1997·Granted Jul 21, 1998·107 cites·26 claims
- 2387US6118798ASemiconductor laser control systemRICOH KK·Filed 1999·Granted Sep 12, 2000·63 cites·11 claims
- 2486US8610971B2Image forming apparatusOMORI ATSUFUMI·Filed 2011·Granted Dec 17, 2013·4 cites·19 claims
- 2586US7920305B2Optical scanning device, optical scanning method, computer program product for executing optical scanning method, recording medium with computer program recorded thereon, image forming apparatus, and color image forming apparatus using the sameRICOH CO LTD·Filed 2007·Granted Apr 5, 2011·9 cites·19 claims
- 2686US7212224B2Pixel clock creation method, pixel clock creation device, optical scanning device, and image forming apparatusRICOH KK·Filed 2004·Granted May 1, 2007·37 cites·14 claims
- 2785US7903135B2Optical scanning device and image forming apparatus for optimizing arrangement intervals in a main-scanning direction and a sub-scanning directionRICOH CO LTD·Filed 2008·Granted Mar 8, 2011·8 cites·18 claims
- 2884US5138623ASemiconductor laser control deviceRICOH KK·Filed 1991·Granted Aug 11, 1992·48 cites·17 claims
- 2983US8310513B2Light-source driving device, optical scanning device, and image forming apparatusNIHEI YASUHIRO·Filed 2010·Granted Nov 13, 2012·6 cites·14 claims
- 3082US7936367B2Image forming apparatus controlling the output level of the light sourceRICOH CO LTD·Filed 2008·Granted May 3, 2011·6 cites·21 claims
- 3182US6006662AAutomatic control apparatus in printing pressKOMORI PRINTING MACH·Filed 1998·Granted Dec 28, 1999·23 cites·9 claims
- 3281US5237579ASemiconductor laser controller using optical-electronic negative feedback loopRICOH KK·Filed 1992·Granted Aug 17, 1993·44 cites·23 claims
- 3380US8687036B2Light source driver, light source device, light scanning device and image forming apparatusISHIDA MASAAKI·Filed 2008·Granted Apr 1, 2014·6 cites·8 claims
- 3480US8654168B2Optical scanning device, image forming apparatus, and optical scanning device designing methodAKATSU KAZUHIRO·Filed 2012·Granted Feb 18, 2014·3 cites·10 claims
- 3579US9298122B2Image forming apparatus, image forming method, and method of producing printed material for generating a parallel line pattern of uniform concentrationIWATA MUNEAKI·Filed 2014·Granted Mar 29, 2016·3 cites·13 claims
- 3679US5258780ABeam recorder forming low density dotsRICOH KK·Filed 1991·Granted Nov 2, 1993·50 cites·17 claims
- 3778US9521295B2Image forming apparatus and image forming methodFUJITA HAYATO·Filed 2014·Granted Dec 13, 2016·3 cites·19 claims
- 3878US9035988B2Light source driving device, light scanning device and image forming apparatusNIHEI YASUHIRO·Filed 2008·Granted May 19, 2015·5 cites·10 claims
- 3977US9405211B2Light source drive circuit, optical scanning apparatus, and image forming apparatusRICOH CO LTD·Filed 2013·Granted Aug 2, 2016·4 cites·6 claims
- 4077US7671882B2Semiconductor laser modulation driving apparatus and image forming apparatusRICOH KK·Filed 2005·Granted Mar 2, 2010·5 cites·19 claims
- 4177US7496121B2Laser modulating and driving device and image reproducing apparatus using the sameRICOH KK·Filed 2004·Granted Feb 24, 2009·15 cites·27 claims
- 4276US8089665B2Optical scanning device moving gravity center of pixel in sub-scanning direction, image forming apparatus having light sources, and methodOMORI ATSUFUMI·Filed 2007·Granted Jan 3, 2012·4 cites·20 claims
- 4375US8860190B2Semiconductor deviceYAMADA KEIJU·Filed 2012·Granted Oct 14, 2014·3 cites·7 claims
- 4475US8270026B2Light source driving device with relationship-based drive signal generating circuit, optical scanning device, and image forming apparatusNIHEI YASUHIRO·Filed 2009·Granted Sep 18, 2012·4 cites·9 claims
- 4575US8005321B2Pixel clock generator, optical scanner, and image forming apparatusRICOH CO LTD·Filed 2005·Granted Aug 23, 2011·4 cites·15 claims
- 4674US8648892B2Image forming apparatus to detect and correct density variations in a developed imageSUZUKI SEIZO·Filed 2012·Granted Feb 11, 2014·2 cites·5 claims
- 4774US7936493B2Dot position correcting apparatus, optical scanning apparatus, imaging apparatus, and color imaging apparatusRICOH CO LTD·Filed 2006·Granted May 3, 2011·4 cites·4 claims
- 4872US12442753B2Environment forming deviceESPEC CORP·Filed 2023·Granted Oct 14, 2025·0 cites·9 claims
- 4972US8928715B2Light source driver, light source-driving method, image-forming apparatus, light source-driving circuit, and optical scannerOMORI ATSUFUMI·Filed 2013·Granted Jan 6, 2015·2 cites·20 claims
- 5072US7728780B2Antenna device and information terminal deviceTOSHIBA KK·Filed 2008·Granted Jun 1, 2010·5 cites·9 claims
Showing the top 50 of 109 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →