Inventor · disambiguated record
Keiji Tanaka
Also filed as: TANAKA KEIJI · TERAI KIYOSHI
146 granted patents·38 pending applications·1,667 citations·filing 1974–2025
99Inventor score
Files withSUMITOMO ELECTRIC INDUSTRIES79CANON KK13SANYO CHEMICAL IND LTD10SHELL OIL CO9TANAKA KEIJI7
Top patents by PatentIndex Score
184 records- 0197US5751452AOptical devices with high polymer material and method of forming the sameNIPPON TELEGRAPH & TELEPHONE·Filed 1994·Granted May 12, 1998·281 cites·19 claims
- 0296US11799288B2Electrostatic protection circuit and semiconductor integrated circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Oct 24, 2023·3 cites·18 claims
- 0395US11990747B2Electrostatic protection circuit and semiconductor integrated circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted May 21, 2024·2 cites·12 claims
- 0495US11411542B2Transimpedance amplifier circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Aug 9, 2022·4 cites·9 claims
- 0594US11601203B2Transimpedance amplifier for receiving burst optical signalSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Mar 7, 2023·3 cites·9 claims
- 0694US5748272AMethod for making an optical device using a laser beam interference patternNIPPON TELEGRAPH & TELEPHONE·Filed 1996·Granted May 5, 1998·176 cites·11 claims
- 0794US3936184AElectrophotographic copying machineCANON KK·Filed 1974·Granted Feb 3, 1976·31 cites·10 claims
- 0893US6142469ASheet ejecting mechanism with contact member and advance descending of tray to prevent direct return of contact memberSHARP KK·Filed 1998·Granted Nov 7, 2000·62 cites·9 claims
- 0992US10819425B2Transimpedance amplifier for receiving burst optical signalSUMITOMO ELECTRIC INDUSTRIES·Filed 2019·Granted Oct 27, 2020·9 cites·14 claims
- 1092US5124769AThin film transistorNIPPON TELEGRAPH & TELEPHONE·Filed 1991·Granted Jun 23, 1992·113 cites·24 claims
- 1192US4466164ASupercalendering apparatusFUJI PHOTO FILM CO LTD·Filed 1981·Granted Aug 21, 1984·42 cites·11 claims
- 1291US12068788B2Receiver circuit for optical communicationSUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Granted Aug 20, 2024·2 cites·13 claims
- 1391US11486760B2Receiving circuit and optical receiving circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2021·Granted Nov 1, 2022·2 cites·8 claims
- 1488US10666013B2Driver circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted May 26, 2020·4 cites·12 claims
- 1588US6284362B1Absorbent compositions, methods for producing thereof and absorbent productsSANYO CHEMICAL IND LTD·Filed 2000·Granted Sep 4, 2001·44 cites·28 claims
- 1687US11595010B2Optical receiver and transimpedance amplifier circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Feb 28, 2023·2 cites·6 claims
- 1787US11349444B2Transimpedance amplifier circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted May 31, 2022·2 cites·11 claims
- 1887US11051563B2Air cooling blower and air-cooled clothing on which air cooling blower is mountedSUN S CO LTD·Filed 2017·Granted Jul 6, 2021·10 cites·12 claims
- 1987US4324177ACalender roll for supercalenderFUJI PHOTO FILM CO LTD·Filed 1980·Granted Apr 13, 1982·52 cites·8 claims
- 2087US4189206AOptical switching deviceFUJITSU LTD·Filed 1978·Granted Feb 19, 1980·53 cites·12 claims
- 2186US9046703B2Optical modulator module and semiconductor optical modulatorSUMITOMO ELECTRIC INDUSTRIES·Filed 2014·Granted Jun 2, 2015·9 cites·13 claims
- 2286US7843212B2Differential circuit with precisely controlled terminator circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2008·Granted Nov 30, 2010·16 cites·5 claims
- 2386US7835268B2Optical termination systemKDDI CORP·Filed 2006·Granted Nov 16, 2010·11 cites·14 claims
- 2485US11744008B2Printed board and printed board assemblySUMITOMO ELECTRIC INDUSTRIES·Filed 2022·Granted Aug 29, 2023·1 cites·13 claims
- 2585US10656444B2Optical modulatorSUMITOMO ELECTRIC INDUSTRIES·Filed 2018·Granted May 19, 2020·2 cites·17 claims
- 2684US11362629B2Transimpedance amplifier circuitSUMITOMO ELECTRIC INDUSTRIES·Filed 2020·Granted Jun 14, 2022·2 cites·9 claims
- 2784US7483459B2Laser driver with selectable output impedanceSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Granted Jan 27, 2009·8 cites·11 claims
- 2884US6951911B2Cross-linked polymer and process for producing the same, absorptive structure and absorptive articleSANYO CHEMICAL IND LTD·Filed 2002·Granted Oct 4, 2005·27 cites·26 claims
- 2983US9116367B2Driver for electro-absorption modulatorSUMITOMO ELECTRIC INDUSTRIES·Filed 2014·Granted Aug 25, 2015·3 cites·12 claims
- 3083US8766728B2Trans-impedance amplifier with enhanced dynamic range but invariable input impedanceSUMITOMO ELECTRIC INDUSTRIES·Filed 2012·Granted Jul 1, 2014·8 cites·6 claims
- 3183US8405461B2Light receiving circuit with differential outputMOTO AKIHIRO·Filed 2011·Granted Mar 26, 2013·9 cites·10 claims
- 3283US6397067B1Roadside transmitterSUMITOMO ELECTRIC INDUSTRIES·Filed 2000·Granted May 28, 2002·28 cites·5 claims
- 3382US8571078B2Laser driver and optical transmitter implementing the sameMOTO AKIHIRO·Filed 2011·Granted Oct 29, 2013·5 cites·14 claims
- 3482US8358938B2Optical receiver able to prevent LOS alarm from malfunctioningSUMITOMO ELECTRIC INDUSTRIES·Filed 2009·Granted Jan 22, 2013·8 cites·9 claims
- 3582US7558482B2Method for dynamically establishing logical link in PON systems and an optical network unit for the methodKDDI CORP·Filed 2005·Granted Jul 7, 2009·10 cites·8 claims
- 3682US6594428B1Dispersion compensating optical transmission line and systemKDD CORP·Filed 2000·Granted Jul 15, 2003·27 cites·43 claims
- 3782US4298268AMethod and device for cleaning photosensitive screen in an image forming apparatusSATO TADASHI·Filed 1978·Granted Nov 3, 1981·16 cites·4 claims
- 3881US6465254B1Mutant loxP site and applications thereofSUMITOMO PHARMA·Filed 1998·Granted Oct 15, 2002·40 cites·34 claims
- 3981US4050802AElectrophotographic copying machineCANON KK·Filed 1976·Granted Sep 27, 1977·19 cites·14 claims
- 4080US8121161B2Laser diode driver driven in shunt mode by signals complementary to each otherTANAKA KEIJI·Filed 2009·Granted Feb 21, 2012·6 cites·11 claims
- 4180US7912380B2Optical receiverSUMITOMO ELECTRIC INDUSTRIES·Filed 2006·Granted Mar 22, 2011·7 cites·5 claims
- 4279US8704592B2Traveling wave amplifier with pre-emphasis functionTATSUMI TAIZOU·Filed 2012·Granted Apr 22, 2014·10 cites·14 claims
- 4379US6754420B2Optical fiber transmission lineKDDI SUBMARINE CABLE SYS INC·Filed 2002·Granted Jun 22, 2004·22 cites·6 claims
- 4478US6500787B1Lubricant composition and its use in a ball jointSHELL OIL CO·Filed 2000·Granted Dec 31, 2002·20 cites·15 claims
- 4577US9608405B2Laser driver with maintaining average optical power constantSUMITOMO ELECTRIC INDUSTRIES·Filed 2016·Granted Mar 28, 2017·2 cites·6 claims
- 4677US9290715B2Grease compositionSHELL OIL CO·Filed 2012·Granted Mar 22, 2016·2 cites·21 claims
- 4777US7286611B2Roadway communication systemSUMITOMO ELECTRIC INDUSTRIES·Filed 2004·Granted Oct 23, 2007·15 cites·11 claims
- 4877US5351621ATraveling inspection robot systemHITACHI LTD·Filed 1993·Granted Oct 4, 1994·57 cites·22 claims
- 4976US7466928B2Optical receiver with dynamic gain and bandwidthSUMITOMO ELECTRIC INDUSTRIES·Filed 2005·Granted Dec 16, 2008·6 cites·6 claims
- 5076US6995010B1Gene transfer methodTAKARA BIO INC·Filed 2000·Granted Feb 7, 2006·4 cites·7 claims
Showing the top 50 of 184 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →