Inventor · disambiguated record
Takuya Oka
Also filed as: OKA TAKUYA
31 granted patents·16 pending applications·149 citations·filing 1996–2024
94Inventor score
Files withCANON KK18UBE INDUSTRIES11PANASONIC IP MAN CO LTD4MATSUSHITA ELECTRIC INDUSTRIAL CO LTD3NAKATANI MASAYA2
Top patents by PatentIndex Score
47 records- 0194US11372348B2Developing device, cartridge, image forming apparatusCANON KK·Filed 2020·Granted Jun 28, 2022·4 cites·40 claims
- 0291US11860565B2Restricting member, developing device, process cartridge, and image forming apparatusCANON KK·Filed 2022·Granted Jan 2, 2024·2 cites·15 claims
- 0379US10877395B2Developing device, process cartridge and image forming apparatusCANON KK·Filed 2019·Granted Dec 29, 2020·1 cites·14 claims
- 0474US8557195B2Sensor substrate and array substrate using the sameNAKATANI MASAYA·Filed 2012·Granted Oct 15, 2013·2 cites·18 claims
- 0573US12455528B2Restricting member, developing device, process cartridge, and image forming apparatusCANON KK·Filed 2023·Granted Oct 28, 2025·0 cites·15 claims
- 0672US9783640B2Polyimide precursor, polyimide, polyimide film, varnish, and substrateUBE INDUSTRIES·Filed 2013·Granted Oct 10, 2017·1 cites·32 claims
- 0771US9866009B2Protection circuitONKYO & PIONEER TECH CORPORATION·Filed 2015·Granted Jan 9, 2018·2 cites·2 claims
- 0869US11835888B2Developing device, cartridge, image forming apparatusCANON KK·Filed 2022·Granted Dec 5, 2023·0 cites·11 claims
- 0967US11693335B2Development cartridgeCANON KK·Filed 2022·Granted Jul 4, 2023·0 cites·8 claims
- 1063US8906234B2Filter deviceYAMAMOTO TAKEKI·Filed 2012·Granted Dec 9, 2014·2 cites·24 claims
- 1163US5691525AData transfer system and data transfer terminal deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Nov 25, 1997·105 cites·11 claims
- 1262US11300900B2Development cartridgeCANON KK·Filed 2021·Granted Apr 12, 2022·0 cites·17 claims
- 1362US8702930B2Sensor chip and storage method thereofHASHIMOTODANI KIYOSHI·Filed 2012·Granted Apr 22, 2014·2 cites·10 claims
- 1461US12510858B2Image forming apparatusCANON KK·Filed 2024·Granted Dec 30, 2025·0 cites·13 claims
- 1558US10852662B2Developing device, process cartridge and image forming apparatusCANON KK·Filed 2019·Granted Dec 1, 2020·0 cites·15 claims
- 1658US6772953B2Contactless data carrierMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Aug 10, 2004·10 cites·4 claims
- 1757US11245148B2Nonaqueous electrolyte secondary battery and battery modulePANASONIC IP MAN CO LTD·Filed 2018·Granted Feb 8, 2022·0 cites·8 claims
- 1857US10761453B2Developing device, process cartridge, and image forming apparatusCANON KK·Filed 2019·Granted Sep 1, 2020·0 cites·16 claims
- 1957US9758623B2Polyimide precursor and polyimideUBE INDUSTRIES·Filed 2015·Granted Sep 12, 2017·0 cites·34 claims
- 2055US2024158578A1Polyimide precursor composition and polyimide filmUBE CORP·Filed 2022·Application pending·0 cites
- 2154US2025076806A1Image forming apparatusCANON KK·Filed 2024·Application pending·0 cites
- 2254US2025068112A1Image forming apparatusCANON KK·Filed 2024·Application pending·0 cites
- 2354US2025278035A1Image forming apparatusCANON KK·Filed 2024·Application pending·0 cites
- 2453US11450917B2Power storage devicePANASONIC IP MAN CO LTD·Filed 2018·Granted Sep 20, 2022·0 cites·1 claims
- 2553US9029150B2Cell culture substrate and cell culture method using sameNAKATANI MASAYA·Filed 2011·Granted May 12, 2015·0 cites·15 claims
- 2652US10174166B2Polyimide precursor, polyimide, varnish, polyimide film, and substrateUBE INDUSTRIES·Filed 2013·Granted Jan 8, 2019·0 cites·19 claims
- 2751US11073788B2Process cartridge providing fixation layer to developer on image bearing member and image forming apparatusCANON KK·Filed 2019·Granted Jul 27, 2021·0 cites·11 claims
- 2850US10781288B2Polyimide precursor and polyimideUBE INDUSTRIES·Filed 2013·Granted Sep 22, 2020·0 cites·8 claims
- 2950US10520884B2Cartridge and image forming apparatusCANON KK·Filed 2018·Granted Dec 31, 2019·0 cites·15 claims
- 3049US12321108B2Image forming apparatusCANON KK·Filed 2022·Granted Jun 3, 2025·0 cites·11 claims
- 3149US10893763B2Plate with inclined surfacePORTEARTH CO LTD·Filed 2018·Granted Jan 19, 2021·0 cites·3 claims
- 3249US2016137787A1Polymide precursor and polymideUBE INDUSTRIES·Filed 2014·Application pending·0 cites
- 3349US2016281280A1Fiber structure, and biochip, substrate for cell culture and filter, each of which uses said fiber structurePANASONIC IP MAN CO LTD·Filed 2014·Application pending·0 cites
- 3449US2016297995A1Polyimide precursor, polyimide, polyimide film, varnish, and substrateUBE INDUSTRIES·Filed 2014·Application pending·0 cites
- 3548US2014066571A1Polyimide precursor and polyimideTAKASAWA RYOICHI·Filed 2012·Application pending·0 cites
- 3647US2015284513A1Polyimide precursor, polyimide, varnish, polyimide film, and substrateUBE INDUSTRIES·Filed 2013·Application pending·0 cites
- 3744US10976685B2Image forming apparatus to perform an activation control using a developing bias applying member and a speed control unitCANON KK·Filed 2018·Granted Apr 13, 2021·0 cites·18 claims
- 3844US2015316546A1Sensor chipPANASONIC IP MAN CO LTD·Filed 2013·Application pending·0 cites
- 3942US2020133048A1Polyimide filmUBE INDUSTRIES·Filed 2018·Application pending·0 cites
- 4041US11099503B2Image forming apparatusCANON KK·Filed 2020·Granted Aug 24, 2021·0 cites·11 claims
- 4140US2002046338A1Electronic authentication system, URL input system, URL input device, and data recording systemFiled 2001·Application pending·0 cites
- 4240US2017313821A1Polyimide precursor, polyimide, and polyimide filmUBE INDUSTRIES·Filed 2015·Application pending·0 cites
- 4339US5969332ASystem for issuing and utilizing ticketMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Oct 19, 1999·18 cites·10 claims
- 4438US2017342215A1Polyimide film, polyimide precursor, and polyimideUBE INDUSTRIES·Filed 2015·Application pending·0 cites
- 4537US10243516B2Audio amplifier and audio power amplifierONKYO KK·Filed 2018·Granted Mar 26, 2019·0 cites·4 claims
- 4633US2013178597A1Polyimide precursor, polyimide, and materials to be used in producing sameTAKASAWA RYOICHI·Filed 2011·Application pending·0 cites
- 4731US2018171077A1Polyimide precursor composition and polyimide compositionUBE INDUSTRIES·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →