Inventor · disambiguated record
Takao Umeda
Also filed as: UMEDA TAKAO
41 granted patents·895 citations·filing 1981–2008
98Inventor score
Top patents by PatentIndex Score
41 records- 0194US4586790ADisplay panel having uniaxially-stretched organic polymer film as the substrateHITACHI LTD·Filed 1983·Granted May 6, 1986·124 cites·7 claims
- 0293US4959693ADuplex reproducing apparatus with device for cooling and conveying fused toner imageHITACHI LTD·Filed 1988·Granted Sep 25, 1990·49 cites·9 claims
- 0392US5600405ABias cleaning system and electrostatic printing apparatus therewith and operating method thereofHITACHI LTD·Filed 1994·Granted Feb 4, 1997·46 cites·25 claims
- 0485US6345163B1Developing device for image forming apparatusHITACHI KOKI KK·Filed 2000·Granted Feb 5, 2002·25 cites·6 claims
- 0584US4362771ALiquid crystal display element with gap controlling material and process for production thereofHITACHI LTD·Filed 1981·Granted Dec 7, 1982·50 cites·28 claims
- 0681US7651197B2Method of manufacturing an inkjet head through the anodic bonding of silicon membersRICOH PRINTING SYS LTD·Filed 2005·Granted Jan 26, 2010·5 cites·5 claims
- 0781US5630201ADevelopment apparatus having a plurality of rolls rotated at particular speedsHITACHI KOKI KK·Filed 1996·Granted May 13, 1997·31 cites·14 claims
- 0881US4505546ALiquid crystal display deviceHITACHI LTD·Filed 1982·Granted Mar 19, 1985·45 cites·8 claims
- 0977US6032015AApparatus for printing on both sides of an image printing medium by one processHITACHI KOKI KK·Filed 1998·Granted Feb 29, 2000·23 cites·6 claims
- 1077US4634226AOptical apparatus using ferroelectric liquid crystal and switching unit for emitted lightHITACHI LTD·Filed 1984·Granted Jan 6, 1987·39 cites·25 claims
- 1177US4591886ADriving method and apparatus for optical printer with liquid-crystal switching elementHITACHI LTD·Filed 1984·Granted May 27, 1986·39 cites·19 claims
- 1273US7643779B2Developer transporting amount controlling member, developing apparatus, imaging apparatus, and method for exchanging developing unitRICOH KK·Filed 2006·Granted Jan 5, 2010·4 cites·11 claims
- 1373US5138380AElectrostatic recording apparatus, method of controlling the apparatus, and method of evaluating life of photoconductive member of electrostatic recording apparatusHITACHI LTD·Filed 1989·Granted Aug 11, 1992·14 cites·54 claims
- 1472US5515144AApparatus for displaying image information recorded on a document and any modified data added theretoHITACHI LTD·Filed 1993·Granted May 7, 1996·33 cites·40 claims
- 1572US5321477AImage forming apparatus capable of preventing the winding on the image carrierHITACHI LTD·Filed 1992·Granted Jun 14, 1994·23 cites·31 claims
- 1671US4818835ALaser marker and method of laser markingHITACHI LTD·Filed 1988·Granted Apr 4, 1989·37 cites·8 claims
- 1770US5452058AInformation recording system capable of protecting secrecyHITACHI LTD·Filed 1994·Granted Sep 19, 1995·18 cites·28 claims
- 1869US5848323AApparatus for printing images on both sides of an image printing medium by one processHITACHI KOKI KK·Filed 1996·Granted Dec 8, 1998·18 cites·7 claims
- 1968US5832333AElectrostatic recording apparatus and electrostatic recording methodHITACHI KOKI KK·Filed 1996·Granted Nov 3, 1998·19 cites·6 claims
- 2068US5252954AMultiplexed driving method for an electrooptical device, and circuit thereforHITACHI LTD·Filed 1990·Granted Oct 12, 1993·33 cites·8 claims
- 2167US5404201AElectrostatic recording apparatus, method of controlling the apparatus, and method of evaluating life of photoconductive member of electrostatic recording apparatusHITACHI LTD·Filed 1992·Granted Apr 4, 1995·12 cites·63 claims
- 2265US4783149ATime-sharing drive liquid crystal optical switch array and optical printer using this optical switch arrayHITACHI LTD·Filed 1986·Granted Nov 8, 1988·25 cites·14 claims
- 2362US7873312B2Transfer apparatus, method of manufacturing the transfer apparatus and image forming apparatus using the transfer apparatusRICOH CO LTD·Filed 2007·Granted Jan 18, 2011·2 cites·23 claims
- 2461US5659841AElectrostatic recording control method and electrostatic recording apparatusHITACHI KOKI KK·Filed 1995·Granted Aug 19, 1997·17 cites·16 claims
- 2561US5095376AApparatus and method for driving an optical printer having a liquid crystal optical switchHITACHI LTD·Filed 1990·Granted Mar 10, 1992·17 cites·22 claims
- 2660US5559578AElectrostatic recording apparatus with electrified cap and managing system thereofHITACHI LTD·Filed 1993·Granted Sep 24, 1996·12 cites·26 claims
- 2756US5623331AHigh-speed electrophotographic fixing unitHITACHI KOKI KK·Filed 1995·Granted Apr 22, 1997·12 cites·7 claims
- 2856US4769659APrinter utilizing optical switch elementsUMEDA TAKAO·Filed 1987·Granted Sep 6, 1988·18 cites·2 claims
- 2955US6070032AElectrostatic printing apparatus having an erase lampHITACHI KOKI KK·Filed 1999·Granted May 30, 2000·19 cites·7 claims
- 3053US7745307B2Method of manufacturing an inkjet head through the anodic bonding of silicon membersRICOH PRINTING SYS LTD·Filed 2008·Granted Jun 29, 2010·0 cites·3 claims
- 3153US6330403B1Image forming apparatus with adjusting deviceHITACHI KOKI KK·Filed 2000·Granted Dec 11, 2001·5 cites·5 claims
- 3253US5579096AImaging apparatus and method for cleaning transfer/conveyer meansHITACHI KOKI KK·Filed 1995·Granted Nov 26, 1996·12 cites·6 claims
- 3352US5331387APrinting and binding apparatusHITACHI LTD·Filed 1993·Granted Jul 19, 1994·15 cites·10 claims
- 3450US4746196AMultiplexed driving method for an optical switching element employing ferroelectric liquid crystalHITACHI LTD·Filed 1987·Granted May 24, 1988·13 cites·10 claims
- 3550US4712876ADriving ferroelectric liquid crystal printers via short circuitingHITACHI LTD·Filed 1985·Granted Dec 15, 1987·12 cites·2 claims
- 3646US6144836AElectrostatographic printing machineHITACHI KOKI KK·Filed 1997·Granted Nov 7, 2000·8 cites·4 claims
- 3741US5373351AElectrostatic recording apparatus and managing system thereofHITACHI LTD·Filed 1992·Granted Dec 13, 1994·5 cites·10 claims
- 3837US5182596ADevice for measuring surface potentials at photosensitive body and electrostatic recording apparatus using said deviceHITACHI KOKI KK·Filed 1991·Granted Jan 26, 1993·8 cites·7 claims
- 3936US5504556AElectrostatic recording apparatus, method of controlling the apparatus, and method of evaluating life of photoconductive member of electrostatic recording apparatusHITACHI LTD·Filed 1994·Granted Apr 2, 1996·2 cites·18 claims
- 4035US5177531AElectrostatic recorder and electrostatic latent image measuring instrumentHITACHI LTD·Filed 1991·Granted Jan 5, 1993·5 cites·24 claims
- 4132US6101347APaper carrying device in electrostatic recording apparatusHITACHI KOKI KK·Filed 1999·Granted Aug 8, 2000·1 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →