Inventor · disambiguated record
Keiichi Yamaguchi
Also filed as: YAMAGUCHI KEIICHI
94 granted patents·35 pending applications·619 citations·filing 1994–2025
99Inventor score
Top patents by PatentIndex Score
129 records- 0196US11595026B2Vibration element, manufacturing method of vibration element, physical quantity sensor, inertial measurement device, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2021·Granted Feb 28, 2023·4 cites·16 claims
- 0295US11888464B2Vibration element, physical quantity sensor, inertial measurement unit, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2022·Granted Jan 30, 2024·2 cites·14 claims
- 0395US11025222B2Vibration element, manufacturing method of vibration element, physical quantity sensor, inertial measurement device, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2019·Granted Jun 1, 2021·7 cites·19 claims
- 0492US12213381B2Method for manufacturing vibration elementSEIKO EPSON CORP·Filed 2022·Granted Jan 28, 2025·6 cites·3 claims
- 0591US10072928B2Physical quantity detection vibrator element, physical quantity detection apparatus, electronic apparatus, and moving objectSEIKO EPSON CORP·Filed 2016·Granted Sep 11, 2018·9 cites·20 claims
- 0691US7371693B2Manufacturing method of semiconductor device with chamferingSANYO ELECTRIC CO·Filed 2004·Granted May 13, 2008·40 cites·8 claims
- 0790US7207221B2Vibration type gyroscope and method for manufacturing vibration type gyroscopeSEIKO EPSON CORP·Filed 2005·Granted Apr 24, 2007·33 cites·15 claims
- 0889US7959870B2Separator and unloading deviceSOFTARD IND CO LTD·Filed 2009·Granted Jun 14, 2011·25 cites·6 claims
- 0988US7974494B2Image control from composed composite image using HID signal conversion to source image coordinatesTOSHIBA KK·Filed 2006·Granted Jul 5, 2011·9 cites·24 claims
- 1088US7919875B2Semiconductor device with recess portion over pad electrodeSANYO ELECTRIC CO·Filed 2007·Granted Apr 5, 2011·16 cites·4 claims
- 1188US7489910B2Wireless transmitter and amplifierTOSHIBA KK·Filed 2006·Granted Feb 10, 2009·19 cites·19 claims
- 1287US11444235B2Vibrator device, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2020·Granted Sep 13, 2022·2 cites·11 claims
- 1387US11070169B2Vibration element and oscillatorSEIKO EPSON CORP·Filed 2020·Granted Jul 20, 2021·2 cites·11 claims
- 1487US9438187B2Amplifying device, transmitting deviceTOSHIBA KK·Filed 2014·Granted Sep 6, 2016·8 cites·18 claims
- 1587US8237498B2Doherty amplifier system and transmitter using the sameKATO TAKAYUKI·Filed 2012·Granted Aug 7, 2012·12 cites·12 claims
- 1687US6804500B2High frequency circuit using high output amplifier cell block and low output amplifier cell blockTOSHIBA KK·Filed 2001·Granted Oct 12, 2004·40 cites·14 claims
- 1786US7557017B2Method of manufacturing semiconductor device with two-step etching of layerSANYO ELECTRIC CO·Filed 2005·Granted Jul 7, 2009·14 cites·20 claims
- 1886US6263193B1Microwave transmitter/receiver moduleTOSHIBA KK·Filed 1998·Granted Jul 17, 2001·89 cites·20 claims
- 1984US12255619B2Vibration element, manufacturing method of vibration element, physical quantity sensor, inertial measurement device, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2023·Granted Mar 18, 2025·0 cites·20 claims
- 2083US11340070B2Vibrator device, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2020·Granted May 24, 2022·1 cites·11 claims
- 2181US10760908B2Vibration device, angular velocity sensor, electronic device, and vehicleSEIKO EPSON CORP·Filed 2018·Granted Sep 1, 2020·3 cites·20 claims
- 2281US9013093B2Vibrating reed, electronic device, and electronic apparatusSEIKO EPSON CORP·Filed 2013·Granted Apr 21, 2015·7 cites·15 claims
- 2380US9568313B2Electronic device, electronic apparatus, and moving objectSEIKO EPSON CORP·Filed 2015·Granted Feb 14, 2017·3 cites·6 claims
- 2480US6455880B1Microwave semiconductor device having coplanar waveguide and micro-strip lineTOSHIBA KK·Filed 1999·Granted Sep 24, 2002·70 cites·19 claims
- 2579US11181371B2Vibrator device, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2020·Granted Nov 23, 2021·1 cites·13 claims
- 2679US7138862B2Power amplifier and radio communication device using the amplifierTOSHIBA KK·Filed 2005·Granted Nov 21, 2006·7 cites·10 claims
- 2778US11290067B2Radio frequency circuitTOSHIBA KK·Filed 2020·Granted Mar 29, 2022·1 cites·16 claims
- 2878US5790078ASuperconducting mixer antenna arrayNEC CORP·Filed 1996·Granted Aug 4, 1998·29 cites·6 claims
- 2977US10690500B2Sensor element, sensor, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2018·Granted Jun 23, 2020·2 cites·20 claims
- 3077US6934557B2Portable type radio equipmentTOSHIBA KK·Filed 2002·Granted Aug 23, 2005·18 cites·23 claims
- 3177US2025175149A1Vibration Element, Manufacturing Method Of Vibration Element, Physical Quantity Sensor, Inertial Measurement Device, Electronic Apparatus, And VehicleSEIKO EPSON CORP·Filed 2025·Application pending·0 cites
- 3277US2025088171A1Method of manufacturing vibrator element, vibrator element, and vibratorSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 3376US2025232546A1Computer program, method, and serverGREE INC·Filed 2025·Application pending·0 cites
- 3475US11940275B2Vibrator device, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2022·Granted Mar 26, 2024·0 cites·9 claims
- 3575US9631926B2Vibration element, vibrator, vibration device, electronic device and moving objectSEIKO EPSON CORP·Filed 2014·Granted Apr 25, 2017·4 cites·11 claims
- 3675US7778354B2Communicating apparatus, method of calculating set value of orthogonal error compensation and orthogonal error compensation programTOSHIBA KK·Filed 2007·Granted Aug 17, 2010·6 cites·11 claims
- 3774US2022236058A1Vibrator Device, Electronic Apparatus, And VehicleSEIKO EPSON CORP·Filed 2022·Application pending·0 cites
- 3873US11650054B2Vibrator device, electronic apparatus, and vehicleSEIKO EPSON CORP·Filed 2022·Granted May 16, 2023·0 cites·13 claims
- 3973US8351875B2Distortion compensator, distortion compensation method, and transmitterTOSHIBA KK·Filed 2009·Granted Jan 8, 2013·7 cites·17 claims
- 4073US7312107B2Semiconductor device and manufacturing method thereofSANYO ELECTRIC CO·Filed 2004·Granted Dec 25, 2007·17 cites·13 claims
- 4173US7221920B2Voltage controlled oscillator, frequency synthesizer and communication apparatusTOSHIBA KK·Filed 2004·Granted May 22, 2007·19 cites·17 claims
- 4272US9590829B2Modulated signal generating device and wireless deviceTOSHIBA KK·Filed 2015·Granted Mar 7, 2017·2 cites·10 claims
- 4372US9341643B2Vibrator element, method of manufacturing vibrator element, vibrator, electronic device, electronic apparatus and moving bodySEIKO EPSON CORP·Filed 2013·Granted May 17, 2016·3 cites·20 claims
- 4472US7034631B2Symmetric microwave filter and microwave integrated circuit merging the sameTOSHIBA KK·Filed 2005·Granted Apr 25, 2006·4 cites·20 claims
- 4571US7352900B2Apparatus and method for processing particle images and program product for sameSYSMEX CORP·Filed 2004·Granted Apr 1, 2008·11 cites·12 claims
- 4670US12283017B2Computer program, method, and serverGREE INC·Filed 2022·Granted Apr 22, 2025·0 cites·19 claims
- 4770US9379307B2Vibrator element, vibrator, electronic device, electronic apparatus, and moving objectSEIKO EPSON CORP·Filed 2013·Granted Jun 28, 2016·3 cites·19 claims
- 4870US8631087B2Information processing server, remote control system, and remote control method using a tunnel to determine a service on another network and executing the service without using the tunnelISE KOTARO·Filed 2006·Granted Jan 14, 2014·5 cites·19 claims
- 4970US7974654B2Communication apparatus performing key feature extraction for cognitive radio systemTOSHIBA KK·Filed 2007·Granted Jul 5, 2011·4 cites·16 claims
- 5069US10069461B2Doherty amplifierTOSHIBA KK·Filed 2017·Granted Sep 4, 2018·2 cites·9 claims
Showing the top 50 of 129 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →