Inventor · disambiguated record
Takashi Yamakawa
Also filed as: YAMAKAWA TAKASHI
65 granted patents·12 pending applications·307 citations·filing 1984–2020
98Inventor score
Files withMITSUBISHI ELECTRIC CORP39YAMAHA CORP12YAMAKAWA TAKASHI6SANYO ELECTRIC CO5HATAKEYAMA KAZUNORI2
Top patents by PatentIndex Score
77 records- 0195US8261540B2Particulate matter sensor and exhaust gas purification apparatusKONSTANDOPOULOS ATHANASIOS G·Filed 2010·Granted Sep 11, 2012·33 cites·21 claims
- 0294US10686397B2Motor system, motor drive device, refrigeration cycle device, and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Jun 16, 2020·7 cites·14 claims
- 0390US10038769B2Sound emission and collection device, and sound emission and collection methodYAMAHA CORP·Filed 2017·Granted Jul 31, 2018·9 cites·20 claims
- 0490US9746216B2Heat pump device, heat pump system, air conditioner, and freezerYAMAKAWA TAKASHI·Filed 2012·Granted Aug 29, 2017·10 cites·16 claims
- 0590US9431915B2Power conversion apparatus and refrigeration air-conditioning apparatusARISAWA KOICHI·Filed 2013·Granted Aug 30, 2016·12 cites·18 claims
- 0688US11005410B2Motor driving apparatusMITSUBISHI ELECTRIC CORP·Filed 2016·Granted May 11, 2021·3 cites·24 claims
- 0788US6651458B1Internal intermediate pressure 2-stage compression type rotary compressorSANYO ELECTRIC CO·Filed 2000·Granted Nov 25, 2003·44 cites·7 claims
- 0887US9225258B2Backflow preventing means, power converting device, and refrigerating and air-conditioning apparatusSHIMOMUGI TAKUYA·Filed 2011·Granted Dec 29, 2015·14 cites·19 claims
- 0987US6616428B2Double-cylinder two-stage compression rotary compressorSANYO ELECTRIC CO·Filed 2001·Granted Sep 9, 2003·29 cites·6 claims
- 1085US9240736B2Power converting device, motor driving device, and refrigerating and air-conditioning apparatusSHIMOMUGI TAKUYA·Filed 2011·Granted Jan 19, 2016·8 cites·19 claims
- 1182US6568198B1Multi-stage compression refrigerating deviceSANYO ELECTRIC CO·Filed 2000·Granted May 27, 2003·32 cites·10 claims
- 1281US6318981B1Two-cylinder type two-stage compression rotary compressorSANYO ELECTRIC CO·Filed 2000·Granted Nov 20, 2001·19 cites·3 claims
- 1379US11189439B2Power converting apparatus, motor drive apparatus, and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Nov 30, 2021·2 cites·19 claims
- 1477US11368118B2Motor driving device and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Jun 21, 2022·2 cites·7 claims
- 1577US9825575B2Power converting apparatus, dehumidifier, air conditioner, and refrigeration apparatusMITSUBISHI ELECTRIC CORP·Filed 2014·Granted Nov 21, 2017·4 cites·18 claims
- 1676US10465965B2Heat pump apparatus, and air conditioner, heat pump water heater, and refrigerator including the heat pump apparatusMITSUBISHI ELECTRIC CORP·Filed 2014·Granted Nov 5, 2019·3 cites·7 claims
- 1776US6581408B1Multi-stage compression refrigerating deviceSANYO ELECTRIC CO·Filed 2000·Granted Jun 24, 2003·23 cites·4 claims
- 1875US10833598B2Power conversion device, motor drive control device, blower, compressor, and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Nov 10, 2020·2 cites·20 claims
- 1974US11909299B2Power converting apparatus, motor driving apparatus, and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2018·Granted Feb 20, 2024·2 cites·22 claims
- 2074US11031895B2Motor drive system and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Jun 8, 2021·1 cites·11 claims
- 2174US10658966B2Motor driving apparatus, refrigerator, and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2016·Granted May 19, 2020·1 cites·13 claims
- 2274US8856136B2Information update systemYAMAKAWA TAKASHI·Filed 2010·Granted Oct 7, 2014·4 cites·12 claims
- 2373US11005404B2Motor driving apparatusMITSUBISHI ELECTRIC CORP·Filed 2016·Granted May 11, 2021·1 cites·10 claims
- 2473US10658967B2Motor drive apparatus and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2014·Granted May 19, 2020·2 cites·19 claims
- 2570US11863099B2Air conditioner and driving deviceMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Jan 2, 2024·1 cites·20 claims
- 2670US7974424B2Speaker array systemYAMAHA CORP·Filed 2008·Granted Jul 5, 2011·5 cites·5 claims
- 2769US11683001B2Motor driving apparatusMITSUBISHI ELECTRIC CORP·Filed 2020·Granted Jun 20, 2023·0 cites·8 claims
- 2868US11101728B2Power converting apparatus, motor drive control apparatus, blower, compressor, and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Aug 24, 2021·1 cites·20 claims
- 2967US9941810B2Power conversion device for converting AC power into DC powerMITSUBISHI ELECTRIC CORP·Filed 2014·Granted Apr 10, 2018·2 cites·7 claims
- 3065US10938318B2AC-DC converting apparatus, motor drive control apparatus, blower, compressor, and air conditionerMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Mar 2, 2021·1 cites·17 claims
- 3165US9685800B2Charging/discharging systemHATAKEYAMA KAZUNORI·Filed 2013·Granted Jun 20, 2017·3 cites·20 claims
- 3263US12015362B2Heat pump apparatus, air conditioner, and refrigeratorMITSUBISHI ELECTRIC CORP·Filed 2019·Granted Jun 18, 2024·0 cites·15 claims
- 3363US11297419B2Array microphone and sound collection methodYAMAHA CORP·Filed 2020·Granted Apr 5, 2022·0 cites·20 claims
- 3463US9807215B2Sound emission and collection device, and sound emission and collection methodYAMAHA CORP·Filed 2015·Granted Oct 31, 2017·1 cites·15 claims
- 3563US8275160B2Delay time calculation apparatus, delay time calculation method, and storage medium storing program thereforKUSHIDA KOJI·Filed 2009·Granted Sep 25, 2012·3 cites·9 claims
- 3662US9825488B2Power supply switching device and switch boardSHINOMOTO YOSUKE·Filed 2013·Granted Nov 21, 2017·2 cites·16 claims
- 3760US10710186B2Method of manufacturing impellerEBARA CORP·Filed 2016·Granted Jul 14, 2020·1 cites·16 claims
- 3860US9385642B2Air conditionerHATAKEYAMA KAZUNORI·Filed 2012·Granted Jul 5, 2016·1 cites·16 claims
- 3960US8861742B2Masker sound generation apparatus and programKOIKE MAI·Filed 2011·Granted Oct 14, 2014·3 cites·18 claims
- 4059US10869123B2Array microphone and sound collection methodYAMAHA CORP·Filed 2019·Granted Dec 15, 2020·0 cites·20 claims
- 4159US9991817B2Power converting device that uses a sine-wave-shaped current control range to output drive signalMITSUBISHI ELECTRIC CORP·Filed 2014·Granted Jun 5, 2018·1 cites·10 claims
- 4259US9742267B2Power conversion apparatus and refrigeration air-conditioning apparatusMITSUBISHI ELECTRIC CORP·Filed 2013·Granted Aug 22, 2017·1 cites·17 claims
- 4358US9929637B2Power converting deviceMITSUBISHI ELECTRIC CORP·Filed 2014·Granted Mar 27, 2018·1 cites·27 claims
- 4457US8363845B2Speaker array apparatus and signal processing method thereforYAMAHA CORP·Filed 2008·Granted Jan 29, 2013·1 cites·7 claims
- 4556US10177703B2Power conversion device and compressor driving deviceMITSUBISHI ELECTRIC CORP·Filed 2014·Granted Jan 8, 2019·0 cites·15 claims
- 4652US11906177B2Outdoor unitMITSUBISHI ELECTRIC CORP·Filed 2018·Granted Feb 20, 2024·0 cites·16 claims
- 4751US11398790B2Air conditionerMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Jul 26, 2022·0 cites·10 claims
- 4850US9621025B2Backflow preventing device, power conversion apparatus, motor driver, and refrigerating and air-conditioning apparatusMITSUBISHI ELECTRIC CORP·Filed 2013·Granted Apr 11, 2017·0 cites·18 claims
- 4950US8331590B2Delay time calculation apparatus and methodYAMAKAWA TAKASHI·Filed 2009·Granted Dec 11, 2012·0 cites·2 claims
- 5050US2022136753A1Heat pump device, heat pump system, air conditioner, and refrigeration machineMITSUBISHI ELECTRIC CORP·Filed 2019·Application pending·0 cites
Showing the top 50 of 77 patent records by PatentIndex Score.
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