Inventor · disambiguated record
Keiji Hanzawa
Also filed as: HANZAWA KEIJI
116 granted patents·12 pending applications·1,146 citations·filing 1974–2020
99Inventor score
Files withHITACHI AUTOMOTIVE SYSTEMS LTD55HITACHI LTD30HITACHI CAR ENG CO LTD8NAKANO HIROSHI7ASANO SATOSHI4
Top patents by PatentIndex Score
128 records- 0195US6877383B2Capacitive type pressure sensorHITACHI LTD·Filed 2002·Granted Apr 12, 2005·61 cites·2 claims
- 0295US6188340B1Sensor adjusting circuitHITACHI LTD·Filed 1998·Granted Feb 13, 2001·102 cites·15 claims
- 0395US6167761B1Capacitance type pressure sensor with capacitive elements actuated by a diaphragmHITACHI LTD AND HITACHI CAR EN·Filed 1998·Granted Jan 2, 2001·130 cites·10 claims
- 0494US8689608B2Thermal gas sensorNAKANO HIROSHI·Filed 2010·Granted Apr 8, 2014·15 cites·13 claims
- 0594US8640538B2Flow sensor and manufacturing method of the same and flow sensor module and manufacturing method of the sameKONO TSUTOMU·Filed 2011·Granted Feb 4, 2014·15 cites·25 claims
- 0694US5659254ACapacitance type sensor deviceHITACHI LTD·Filed 1995·Granted Aug 19, 1997·104 cites·8 claims
- 0793US8763452B2Thermal air flow sensorDOI RYOSUKE·Filed 2011·Granted Jul 1, 2014·15 cites·17 claims
- 0892US8813556B2Intake temperature sensorMATSUMOTO MASAHIRO·Filed 2011·Granted Aug 26, 2014·11 cites·14 claims
- 0991US8069718B2Thermal flowmeterNAKANO HIROSHI·Filed 2008·Granted Dec 6, 2011·21 cites·11 claims
- 1090US8549901B2Sensor structureSAITO TAKAYUKI·Filed 2012·Granted Oct 8, 2013·11 cites·18 claims
- 1190US6051853ASemiconductor pressure sensor including reference capacitor on the same substrateHITACHI LTD·Filed 1997·Granted Apr 18, 2000·74 cites·27 claims
- 1290US5506454ASystem and method for diagnosing characteristics of acceleration sensorHITACHI LTD·Filed 1993·Granted Apr 9, 1996·86 cites·10 claims
- 1388US9778086B2Flow sensor with a housing that accommodates an auxiliary channel having an opening into which a fluid to be measured is takenARAI SATOSHI·Filed 2012·Granted Oct 3, 2017·7 cites·15 claims
- 1488US8359919B2Thermal humidity sensorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2010·Granted Jan 29, 2013·7 cites·13 claims
- 1588US6538866B1Circuit for protecting a load from an overvoltageHITACHI LTD·Filed 2000·Granted Mar 25, 2003·47 cites·29 claims
- 1687US9658094B2Thermal flow meterHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2012·Granted May 23, 2017·5 cites·12 claims
- 1787US8596113B2Intake air temperature sensor and thermal airflow meter including the sameMATSUMOTO MASAHIRO·Filed 2012·Granted Dec 3, 2013·7 cites·20 claims
- 1886US7269999B2Thermal airflow meterHITACHI CAR ENG CO LTD·Filed 2006·Granted Sep 18, 2007·15 cites·10 claims
- 1986US6839643B2Flowmeter and flowmeter systemHITACHI LTD·Filed 2002·Granted Jan 4, 2005·23 cites·20 claims
- 2083US10514287B2Thermal flow meter with an asymmetrical inflow-side of circuit packageHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2017·Granted Dec 24, 2019·2 cites·9 claims
- 2183US10168195B2Thermal flow meter capable of measuring flow rates in forward flow and reverse flow directionsHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Jan 1, 2019·6 cites·20 claims
- 2283US9752908B2Thermal flow meter with an asymmetrical inflow-side of circuit packageHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Sep 5, 2017·5 cites·7 claims
- 2383US7010971B2Heating resistor type flow-measuring device having a heating resistor and a thermoresistance, whose resistance value varies in response to the ambient temperatureHITACHI CAR ENG CO LTD·Filed 2004·Granted Mar 14, 2006·31 cites·9 claims
- 2483US6564643B1Capacitive pressure sensorHITACHI LTD·Filed 1999·Granted May 20, 2003·52 cites·5 claims
- 2582US10240957B2Thermal airflow sensorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Granted Mar 26, 2019·2 cites·2 claims
- 2681US10001394B2Thermal airflow sensorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2017·Granted Jun 19, 2018·2 cites·18 claims
- 2781US9587970B2Airflow measuring apparatus including a ventilation hole between a connector part and a circuit chamberMORINO TAKESHI·Filed 2011·Granted Mar 7, 2017·6 cites·15 claims
- 2880US8969977B2Flow sensor, method for manufacturing flow sensor and flow sensor moduleKONO TSUTOMU·Filed 2010·Granted Mar 3, 2015·4 cites·9 claims
- 2979US9322686B2Flow sensorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Apr 26, 2016·4 cites·10 claims
- 3079US8844348B2Gas flow rate measurement deviceSUZUKI KAZUNORI·Filed 2011·Granted Sep 30, 2014·5 cites·8 claims
- 3178US10345131B2Thermal flow meterHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Granted Jul 9, 2019·1 cites·10 claims
- 3278US9222813B2Flow sensor and manufacturing method of the same and flow sensor module and manufacturing method of the sameHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Dec 29, 2015·3 cites·8 claims
- 3378US6769298B2Gas flow rate measuring device having an integrated chip temperature sensor and adjustment processing circuit on common chipHITACHI LTD·Filed 2002·Granted Aug 3, 2004·24 cites·36 claims
- 3476US9599496B2Flow rate measuring device with first temperature sensor in a main passage and second temperature sensor in a sub-passageASANO SATOSHI·Filed 2012·Granted Mar 21, 2017·4 cites·16 claims
- 3576US8336376B2Thermal flow meterNAKANO HIROSHI·Filed 2010·Granted Dec 25, 2012·4 cites·16 claims
- 3676US6973826B2Heating resistance flow rate measuring apparatusHITACHI CAR ENG CO LTD·Filed 2005·Granted Dec 13, 2005·7 cites·13 claims
- 3775US9989390B2Thermal airflow measuring deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Jun 5, 2018·3 cites·10 claims
- 3873US10935403B2Thermal flow meter including a cover mounted on a housing and where a bypass passage is formed by the cover and a bypass passage trenchHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2020·Granted Mar 2, 2021·0 cites·13 claims
- 3973US7942053B2Air flow measuring instrument having dust particle diverting structureHITACHI LTD·Filed 2008·Granted May 17, 2011·8 cites·6 claims
- 4072US11629988B2Flow sensor, method for manufacturing flow sensor and flow sensor moduleHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2020·Granted Apr 18, 2023·0 cites·5 claims
- 4171US7677097B2Heating resistor-type gas flowmeterHITACHI LTD·Filed 2008·Granted Mar 16, 2010·7 cites·10 claims
- 4271US6631645B1Semiconductor pressure sensor utilizing capacitance changeHITACHI LTD·Filed 2000·Granted Oct 14, 2003·19 cites·4 claims
- 4370US9733113B2Thermal flow meter including a protrusion protruding from a circuit package body and a temperature detection element buried in the protrusionHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Aug 15, 2017·2 cites·13 claims
- 4469US10018492B2Thermal flow meter with drainage passage at inlet of bypass passageHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Jul 10, 2018·2 cites·5 claims
- 4569US9658091B2Thermal flow meter with lead having a bent portionHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted May 23, 2017·2 cites·8 claims
- 4669US8104355B2Thermal humidity sensorMINAMITANI RINTARO·Filed 2010·Granted Jan 31, 2012·3 cites·7 claims
- 4769US6810345B2Gas flow meterHITACHI LTD·Filed 2001·Granted Oct 26, 2004·13 cites·27 claims
- 4868US10655993B2Thermal flow meter including a cover mounted on a housing and where a bypass passage is formed by the cover and a bypass passage trenchHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2019·Granted May 19, 2020·0 cites·7 claims
- 4968US9574925B2Fluid measurement device having a circuit for precise flow measurementASANO SATOSHI·Filed 2012·Granted Feb 21, 2017·2 cites·11 claims
- 5068US9541437B2Thermal flow meter with a circuit package having an air flow measurement circuit for measuring an air flowHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Jan 10, 2017·2 cites·14 claims
Showing the top 50 of 128 patent records by PatentIndex Score.
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