Inventor · disambiguated record
Ken Takei
Also filed as: TAKEI KEN
74 granted patents·14 pending applications·1,732 citations·filing 1992–2023
99Inventor score
Top patents by PatentIndex Score
88 records- 0197US8811278B2Low/high frequency shared leakage antenna, base station apparatus and close-range detection system using the antennaTAKEI KEN·Filed 2011·Granted Aug 19, 2014·224 cites·20 claims
- 0297US6384680B1RF amplifier with plural combinersHITACHI LTD·Filed 2000·Granted May 7, 2002·93 cites·20 claims
- 0396US6466774B1Wireless handsetHITACHI LTD·Filed 2000·Granted Oct 15, 2002·130 cites·1 claims
- 0495US6750707B2Multi-carrier RF amplifiersHITACHI LTD·Filed 2002·Granted Jun 15, 2004·70 cites·14 claims
- 0593US6198441B1Wireless handsetHITACHI LTD·Filed 1999·Granted Mar 6, 2001·124 cites·8 claims
- 0693US5914693ACoaxial resonant slot antenna, a method of manufacturing thereof, and a radio terminalHITACHI LTD·Filed 1996·Granted Jun 22, 1999·159 cites·20 claims
- 0792US6028561ATunable slot antennaHITACHI LTD·Filed 1998·Granted Feb 22, 2000·122 cites·26 claims
- 0889US8380124B2Communication system by electrostatic coupling and electromagnetic inductionHITACHI DISPLAYS LTD·Filed 2009·Granted Feb 19, 2013·15 cites·14 claims
- 0989US6188369B1Tunable slot antenna with capacitively coupled slot island conductor for precise impedance adjustmentHITACHI LTD·Filed 2000·Granted Feb 13, 2001·55 cites·3 claims
- 1087US5977924ATEM slot array antennaHITACHI LTD·Filed 1997·Granted Nov 2, 1999·92 cites·27 claims
- 1186US9590663B2Radio apparatusHITACHI LTD·Filed 2016·Granted Mar 7, 2017·6 cites·16 claims
- 1286US7157050B2System and method for detecting biological and chemical materialHITACHI LTD·Filed 2003·Granted Jan 2, 2007·27 cites·17 claims
- 1386US6879845B2Wireless communication method and system using beam direction-variable antennaHITACHI LTD·Filed 2001·Granted Apr 12, 2005·47 cites·13 claims
- 1484US9407349B2Polarization-angle-division diversity wireless transmitter, wireless receiver, and wireless communication systemTAKEI KEN·Filed 2011·Granted Aug 2, 2016·6 cites·5 claims
- 1584US7817094B2Antenna, and wireless module, wireless unit and wireless apparatus having the antennaHITACHI LTD·Filed 2008·Granted Oct 19, 2010·10 cites·2 claims
- 1683US5854971AOutput-controlled power amplifier, radio communication terminal and radio communication base stationHITACHI LTD·Filed 1996·Granted Dec 29, 1998·52 cites·49 claims
- 1781US6034644ATunable slot antenna with capacitively coupled slot island conductor for precise impedance adjustmentHITACHI LTD·Filed 1998·Granted Mar 7, 2000·54 cites·15 claims
- 1880US6653977B1Wireless handsetHITACHI LTD·Filed 2000·Granted Nov 25, 2003·34 cites·21 claims
- 1979US9762296B2Wireless communication systemHITACHI LTD·Filed 2015·Granted Sep 12, 2017·3 cites·15 claims
- 2076US7917093B2Wireless monitoring system and child station thereforHITACHI CABLE·Filed 2007·Granted Mar 29, 2011·6 cites·21 claims
- 2176US5559524AAntenna system including a plurality of meander conductors for a portable radio apparatusHITACHI LTD·Filed 1994·Granted Sep 24, 1996·48 cites·11 claims
- 2275US10148338B1Wireless communication systemHITACHI LTD·Filed 2018·Granted Dec 4, 2018·2 cites·14 claims
- 2375US8334619B2Frequency variable power transmitter and receiver in Fresnel region and power transmitting systemTAKEI KEN·Filed 2008·Granted Dec 18, 2012·12 cites·17 claims
- 2475US6396349B2Traveling wave power combiner and radio base stationHITACHI LTD·Filed 2001·Granted May 28, 2002·18 cites·14 claims
- 2575US5585807ASmall antenna for portable radio phoneHITACHI LTD·Filed 1994·Granted Dec 17, 1996·44 cites·48 claims
- 2672US7902986B2RFID tagHITACHI LTD·Filed 2008·Granted Mar 8, 2011·4 cites·20 claims
- 2770US7394426B2Circular polarized antenna, antenna design simulator, and wireless module with the antennaHITACHI CABLE·Filed 2006·Granted Jul 1, 2008·6 cites·10 claims
- 2869US6233434B1System for transmitting/receiving a signal having a carrier frequency band for a radio base stationHITACHI LTD·Filed 1999·Granted May 15, 2001·38 cites·30 claims
- 2969US5298910AAntenna for radio apparatusHITACHI LTD·Filed 1992·Granted Mar 29, 1994·36 cites·38 claims
- 3068US6462714B1Wireless handset using a slot antennaHITACHI LTD·Filed 2001·Granted Oct 8, 2002·18 cites·19 claims
- 3167US9219506B2Wireless transmitter, wireless receiver, wireless communication system, elevator control system, and transformer equipment control systemTAKEI KEN·Filed 2011·Granted Dec 22, 2015·2 cites·13 claims
- 3267US7714787B2Antenna, and wireless module, wireless unit and wireless apparatus having the antennaHITACHI LTD·Filed 2006·Granted May 11, 2010·3 cites·5 claims
- 3367US6937200B2Antenna and wireless apparatusHITACHI CABLE·Filed 2004·Granted Aug 30, 2005·16 cites·11 claims
- 3466US6031494AHandy-phone with shielded high and low frequency circuits and planar antennaHITACHI LTD·Filed 1997·Granted Feb 29, 2000·37 cites·12 claims
- 3562US9705588B2Wireless communication system and wireless communication receiverHITACHI LTD·Filed 2016·Granted Jul 11, 2017·1 cites·10 claims
- 3662US9450652B2Radio communication system, transmitter, receiver, elevator control system, and substation facility monitoring systemHITACHI LTD·Filed 2013·Granted Sep 20, 2016·1 cites·15 claims
- 3762US8542091B2Control of transmitter peak power and duty ratio in a wireless system to maintain average transmitter power and increase communication rangeTAKEI KEN·Filed 2008·Granted Sep 24, 2013·2 cites·9 claims
- 3861US7541979B2Small size thin type antenna, multilayered substrate, high frequency module, and radio terminal mounting themHITACHI CABLE·Filed 2005·Granted Jun 2, 2009·3 cites·20 claims
- 3961US6952565B1Communication terminal, automobile communication terminal, and automobileHITACHI LTD·Filed 1999·Granted Oct 4, 2005·28 cites·25 claims
- 4060US7586443B2Leakage loss line type circularly-polarized wave antenna and high-frequency moduleHITACHI CABLE·Filed 2006·Granted Sep 8, 2009·3 cites·26 claims
- 4159US8184252B2Image display deviceFURUTA FUTOSHI·Filed 2009·Granted May 22, 2012·0 cites·19 claims
- 4259US6236272B1Traveling wave power combiner and radio base stationHITACHI LTD·Filed 1999·Granted May 22, 2001·15 cites·5 claims
- 4357US7755545B2Antenna and method of manufacturing the same, and portable wireless terminal using the sameHITACHI CABLE·Filed 2004·Granted Jul 13, 2010·10 cites·13 claims
- 4456US2024106553A1Wireless Communication Environment Evaluation Method and SystemHITACHI LTD·Filed 2023·Application pending·0 cites
- 4555US7602346B2Antenna module, radio device and mobile radio terminalHITACHI CABLE·Filed 2006·Granted Oct 13, 2009·2 cites·26 claims
- 4655US2023396348A1Radio environment evaluation method and wireless communication characteristic evaluation systemHITACHI LTD·Filed 2023·Application pending·0 cites
- 4754US2009184950A1Power transmission circuitHITACHI DISPLAYS LTD·Filed 2009·Application pending·0 cites
- 4854US2009153445A1Capacitive coupling-type transmitting and receiving circuits for information signalHITACHI DISPLAYS LTD·Filed 2008·Application pending·0 cites
- 4953US7486238B2Circular polarized wave antenna and method for designing sameHITACHI CABLE·Filed 2007·Granted Feb 3, 2009·1 cites·10 claims
- 5053US6452554B1Antenna element and radio communication apparatusHITACHI METALS LTD·Filed 1999·Granted Sep 17, 2002·24 cites·18 claims
Showing the top 50 of 88 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →