Inventor · disambiguated record
Keiichi Takahashi
Also filed as: HIRAKAWA KIKUYA · IIDA TAKAO · TAKAHASHI KEIICHI · TAKASAWA SEIGO
76 granted patents·21 pending applications·773 citations·filing 1977–2025
99Inventor score
Files withTOYOTA MOTOR CO LTD15KYOWA HAKKO KOGYO KK11PRIME PLANET ENERGY & SOLUTIONS INC11TAKAHASHI KEIICHI9NOHMI BOSAI LTD8
Top patents by PatentIndex Score
97 records- 0197US5101038ANovel substance dc 113 and production thereofKYOWA HAKKO KOGYO KK·Filed 1989·Granted Mar 31, 1992·172 cites·1 claims
- 0296US4157194AThermoplastic multi-walled pipesTOKAN KOGYO CO LTD·Filed 1977·Granted Jun 5, 1979·107 cites·14 claims
- 0394US10243196B2Nonaqueous electrolyte secondary batteryTOYOTA MOTOR CO LTD·Filed 2015·Granted Mar 26, 2019·7 cites·5 claims
- 0492US5138059ADc-89 compounds and process for their preparationKYOWA HAKKO KOGYO KK·Filed 1989·Granted Aug 11, 1992·44 cites·1 claims
- 0591US8888870B2Lithium secondary batteryKOGETSU YASUTAKA·Filed 2011·Granted Nov 18, 2014·7 cites·20 claims
- 0689US10651460B2Nonaqueous electrolyte secondary batteryTOYOTA MOTOR CO LTD·Filed 2015·Granted May 12, 2020·3 cites·14 claims
- 0789US8597815B2Nonaqueous electrolyte rechargeable batteryTAKAHASHI KEIICHI·Filed 2010·Granted Dec 3, 2013·6 cites·5 claims
- 0889US8080334B2Lithium secondary batteryKOGETSU YASUTAKA·Filed 2006·Granted Dec 20, 2011·9 cites·13 claims
- 0987US10720673B2Non-aqueous electrolyte secondary batteryTOYOTA MOTOR CO LTD·Filed 2018·Granted Jul 21, 2020·2 cites·6 claims
- 1087US8791379B2SwitchgearKIKUKAWA SHUICHI·Filed 2011·Granted Jul 29, 2014·8 cites·12 claims
- 1187US5344926AProcess for producing staurosporine derivativesKYOWA HAKKO KOGYO KK·Filed 1993·Granted Sep 6, 1994·37 cites·4 claims
- 1286US10297814B2Lithium ion secondary batteryTOYOTA MOTOR CO LTD·Filed 2017·Granted May 21, 2019·2 cites·5 claims
- 1384US2025293241A1Non-aqueous electrolyte secondary batteryPANASONIC HOLDINGS CORP·Filed 2025·Application pending·0 cites
- 1481US8187749B2Positive electrode for lithium ion secondary battery and lithium ion secondary battery using the sameTAKAHASHI KEIICHI·Filed 2008·Granted May 29, 2012·4 cites·8 claims
- 1581US2025193350A1Television receiver coupled to a connection deviceSATURN LICENSING LLC·Filed 2024·Application pending·0 cites
- 1680US4325905AMethod for producing a double-walled paper containerTOKAN KOGYO CO LTD·Filed 1980·Granted Apr 20, 1982·39 cites·2 claims
- 1779US10263294B2Lithium ion secondary batteryTOYOTA MOTOR CO LTD·Filed 2017·Granted Apr 16, 2019·1 cites·2 claims
- 1878US8110771B2Vacuum insulating switch gearTAKAHASHI KEIICHI·Filed 2010·Granted Feb 7, 2012·6 cites·4 claims
- 1978US6779642B2Lubricating structure of hydraulic clutchHONDA MOTOR CO LTD·Filed 2002·Granted Aug 24, 2004·14 cites·8 claims
- 2076US6426018B1Piezoelectric ceramic compositionsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jul 30, 2002·14 cites·4 claims
- 2175US12192683B2Television receiver coupled to a connection deviceSATURN LICENSING LLC·Filed 2023·Granted Jan 7, 2025·0 cites·20 claims
- 2274US4862071AHigh speed circuit testing apparatus having plural test conditionsADVANTEST CORP·Filed 1988·Granted Aug 29, 1989·29 cites·18 claims
- 2373US2024343606A1Method of producing positive electrode active material, positive electrode active material, positive electrode plate, and non-aqueous electrolyte secondary batteryPRIME PLANET ENERGY & SOLUTIONS INC·Filed 2024·Application pending·0 cites
- 2473US2024343605A1Positive electrode active material, positive electrode plate, non-aqueous electrolyte secondary battery, and method of producing positive electrode active materialPRIME PLANET ENERGY & SOLUTIONS INC·Filed 2024·Application pending·0 cites
- 2572US10153481B2Non-aqueous electrolyte secondary batteryTOYOTA MOTOR CO LTD·Filed 2015·Granted Dec 11, 2018·1 cites·12 claims
- 2672US9698414B2Non-aqueous electrolyte secondary battery and method of manufacturing the sameTOYOTA MOTOR CO LTD·Filed 2015·Granted Jul 4, 2017·1 cites·2 claims
- 2772US6330928B1Driving force control device for four-wheel drive vehicleHONDA MOTOR CO LTD·Filed 2000·Granted Dec 18, 2001·23 cites·4 claims
- 2871US12341187B2Non-aqueous electrolyte secondary batteryPANASONIC CORP·Filed 2020·Granted Jun 24, 2025·0 cites·5 claims
- 2971US6514427B2Piezoelectric ceramic composition and piezoelectric element containing the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Feb 4, 2003·10 cites·19 claims
- 3070US10088623B2Light emitting deviceSATURN LICENSING LLC·Filed 2018·Granted Oct 2, 2018·1 cites·20 claims
- 3170US8318359B2Electrode for lithium secondary battery, lithium secondary battery and method for producing the sameTAKAHASHI KEIICHI·Filed 2006·Granted Nov 27, 2012·1 cites·18 claims
- 3269US2025233128A1Positive electrode active material, non-aqueous electrolyte secondary battery, and methods of producing themPRIME PLANET ENERGY & SOLUTIONS INC·Filed 2025·Application pending·0 cites
- 3369US2023411599A1Positive electrode and nonaqueous electrolyte secondary battery including the samePRIME PLANET ENERGY & SOLUTIONS INC·Filed 2023·Application pending·0 cites
- 3469US2023317927A1Positive electrode active material, positive electrode, and lithium-ion batteryPRIME PLANET ENERGY & SOLUTIONS INC·Filed 2023·Application pending·0 cites
- 3568US2023290932A1Positive Electrode Active Material, Positive Electrode and Method of Producing The Same, and Lithium-Ion BatteryPRIME PLANET ENERGY & SOLUTIONS INC·Filed 2023·Application pending·0 cites
- 3668US2025158024A1Positive electrode and method of producing the same, and non-aqueous electrolyte secondary battery including positive electrode and method of producing the samePRIME PLANET ENERGY & SOLUTIONS INC·Filed 2024·Application pending·0 cites
- 3764US12148918B2Positive electrode active material powder, positive electrode, lithium ion battery, and method of producing positive electrodePRIME PLANET ENERGY & SOLUTIONS INC·Filed 2021·Granted Nov 19, 2024·0 cites·16 claims
- 3864US6458287B1Piezoelectric ceramic composition and piezoelectric element containing the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Oct 1, 2002·6 cites·7 claims
- 3964US4236953AProcess for producing thermoplastic multi-walled pipesTOKAN KOGYO CO LTD·Filed 1978·Granted Dec 2, 1980·20 cites·8 claims
- 4064US4155481AContainer cover member having synthetic resin openable portion and method for making the sameTOKAN KOGYO CO LTD·Filed 1978·Granted May 22, 1979·26 cites·8 claims
- 4163US12230788B2Nonaqueous electrolyte secondary batteryPRIME PLANET ENERGY & SOLUTIONS INC·Filed 2022·Granted Feb 18, 2025·0 cites·5 claims
- 4263US9964684B2Light emitting deviceSATURN LICENSING LLC·Filed 2012·Granted May 8, 2018·1 cites·10 claims
- 4363US4650869ADX-52-1 compounds and process for preparing the sameKYOWA HAKKO KOGYO KK·Filed 1984·Granted Mar 17, 1987·7 cites·3 claims
- 4461US8770825B2Kneading apparatus with rotary shafts having stirring membersTAKEMOTO YUSUKE·Filed 2008·Granted Jul 8, 2014·4 cites·16 claims
- 4561US4593097APhenazine carboxylic acid derivatives and a process for production thereofKYOWA HAKKO KOGYO KK·Filed 1984·Granted Jun 3, 1986·7 cites·5 claims
- 4660US2022115648A1Nonaqueous electrolyte secondary batteryPRIME PLANET ENERGY & SOLUTIONS INC·Filed 2021·Application pending·0 cites
- 4759US8399045B2Film formation method and film formation apparatusTAKAHASHI KEIICHI·Filed 2008·Granted Mar 19, 2013·0 cites·9 claims
- 4859US8303672B2Electrode for lithium secondary battery, lithium secondary battery and method for producing the sameTAKAHASHI KEIICHI·Filed 2011·Granted Nov 6, 2012·0 cites·11 claims
- 4959US5428341AFire receiverNOHMI BOSAI LTD·Filed 1994·Granted Jun 27, 1995·26 cites·20 claims
- 5059US2022328810A1Positive electrode and secondary battery including positive electrodePRIME PLANET ENERGY & SOLUTIONS INC·Filed 2022·Application pending·0 cites
Showing the top 50 of 97 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →