Inventor · disambiguated record
Takashi Kumagai
Also filed as: KUMAGAI TAKASHI
108 granted patents·35 pending applications·1,634 citations·filing 1982–2023
99Inventor score
Top patents by PatentIndex Score
143 records- 0199US6449226B1Recording and playback apparatus and method, terminal device, transmitting/receiving method, and storage mediumSONY CORP·Filed 2000·Granted Sep 10, 2002·167 cites·24 claims
- 0297US7522441B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Apr 21, 2009·46 cites·20 claims
- 0396US7411861B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Aug 12, 2008·26 cites·16 claims
- 0496US7391668B2Integrated circuit device and electronic deviceSEIKO EPSON CORP·Filed 2006·Granted Jun 24, 2008·48 cites·11 claims
- 0596US6617694B2Semiconductor chip, semiconductor device, methods of fabricating thereof, circuit board and electronic deviceSEIKO EPSON CORP·Filed 2001·Granted Sep 9, 2003·184 cites·30 claims
- 0696US5067007ASemiconductor device having leads for mounting to a surface of a printed circuit boardHITACHI LTD·Filed 1991·Granted Nov 19, 1991·360 cites·11 claims
- 0795US6512722B2Recording and playback apparatus and method, terminal device, transmitting/receiving method, and storage mediumSONY CORP·Filed 2002·Granted Jan 28, 2003·46 cites·15 claims
- 0894US7411804B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Aug 12, 2008·17 cites·20 claims
- 0994US7126770B1Data processing system having data reproduction independent of data processingSONY CORP·Filed 2000·Granted Oct 24, 2006·41 cites·42 claims
- 1093US7471573B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Dec 30, 2008·13 cites·20 claims
- 1191US6996563B2Communication system, communication method, distribution apparatus, distribution method and terminal apparatusSONY CORP·Filed 2001·Granted Feb 7, 2006·25 cites·3 claims
- 1287US11350517B2Circuit device and power conversion deviceMITSUBISHI ELECTRIC CORP·Filed 2019·Granted May 31, 2022·6 cites·16 claims
- 1384US7532419B2Apparatus and method for writing and reproducing dataSONY CORP·Filed 2005·Granted May 12, 2009·4 cites·9 claims
- 1484US7263513B2Communication system, communication method, distribution apparatus, distribution method and terminal apparatusSONY CORP·Filed 2005·Granted Aug 28, 2007·7 cites·3 claims
- 1584US6713886B2Semiconductor deviceSEIKO EPSON CORP·Filed 2001·Granted Mar 30, 2004·29 cites·9 claims
- 1683US8547773B2Integrated circuit device and electronic instrumentSAIKI TAKAYUKI·Filed 2006·Granted Oct 1, 2013·6 cites·25 claims
- 1781US8054710B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2006·Granted Nov 8, 2011·9 cites·21 claims
- 1881US7764278B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Jul 27, 2010·5 cites·19 claims
- 1981US6657243B2Semiconductor device with SRAM section including a plurality of memory cellsSEIKO EPSON CORP·Filed 2001·Granted Dec 2, 2003·30 cites·27 claims
- 2080US12500028B2Power converter and coil apparatusMITSUBISHI ELECTRIC CORP·Filed 2020·Granted Dec 16, 2025·1 cites·8 claims
- 2179US9960697B2Insulation type step-down converterMITSUBISHI ELECTRIC CORP·Filed 2015·Granted May 1, 2018·2 cites·8 claims
- 2279US8188544B2Integrated circuit device and electronic instrumentKUMAGAI TAKASHI·Filed 2006·Granted May 29, 2012·5 cites·18 claims
- 2379US7564734B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Jul 21, 2009·4 cites·20 claims
- 2477US8310478B2Integrated circuit device and electronic instrumentKUMAGAI TAKASHI·Filed 2006·Granted Nov 13, 2012·7 cites·15 claims
- 2577US7711698B2Communication system, communication method, distribution apparatus, distribution method and terminal apparatusSONY CORP·Filed 2005·Granted May 4, 2010·2 cites·34 claims
- 2676US8559202B2Power conversion apparatusIWATA AKIHIKO·Filed 2010·Granted Oct 15, 2013·5 cites·8 claims
- 2776US7593270B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Sep 22, 2009·3 cites·18 claims
- 2876US7567479B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Jul 28, 2009·3 cites·20 claims
- 2976US7495988B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Feb 24, 2009·3 cites·18 claims
- 3076US6469356B2Semiconductor memory device having different distances between gate electrode layersSEIKO EPSON CORP·Filed 2001·Granted Oct 22, 2002·22 cites·10 claims
- 3176US6329693B1Semiconductor memory device and method of manufacturing the sameSEIKO EPSON CORP·Filed 2000·Granted Dec 11, 2001·31 cites·9 claims
- 3275US11031177B2Power converterMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Jun 8, 2021·1 cites·10 claims
- 3375US7755587B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2006·Granted Jul 13, 2010·3 cites·14 claims
- 3475US6320234B1Semiconductor memory device and method for manufacturing the sameSEIKO EPSON CORP·Filed 1999·Granted Nov 20, 2001·27 cites·9 claims
- 3573US11658089B2Semiconductor deviceMITSUBISHI ELECTRIC CORP·Filed 2018·Granted May 23, 2023·2 cites·15 claims
- 3673US7388803B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Jun 17, 2008·2 cites·26 claims
- 3772US8339352B2Integrated circuit device and electronic instrumentNATORI KANJI·Filed 2011·Granted Dec 25, 2012·2 cites·19 claims
- 3872US7782694B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2006·Granted Aug 24, 2010·2 cites·14 claims
- 3972US7719865B2Power conversion apparatusMITSUBISHI ELECTRIC CORP·Filed 2006·Granted May 18, 2010·9 cites·30 claims
- 4071US7561478B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Jul 14, 2009·2 cites·20 claims
- 4171US6358124B1Pad conditioner cleaning apparatusAPPLIED MATERIALS INC·Filed 1998·Granted Mar 19, 2002·44 cites·34 claims
- 4271US6300229B1Semiconductor device and method of manufacturing the sameSEIKO EPSON CORP·Filed 2000·Granted Oct 9, 2001·15 cites·8 claims
- 4369US8197310B2Dust box and electric tool with the dust boxYAMASHIRO YUKIO·Filed 2011·Granted Jun 12, 2012·2 cites·13 claims
- 4469US7522592B2Packet transfer unitHITACHI LTD·Filed 2004·Granted Apr 21, 2009·11 cites·22 claims
- 4569US6044028ASemiconductor storage device and electronic equipment using the sameSEIKO EPSON CORP·Filed 1997·Granted Mar 28, 2000·33 cites·12 claims
- 4668US8710750B2Light source lighting device including a constant-current supply that is connected to a light source and supplies a constant current of a substantially constant magnitude to the light source, and luminaireNONAKA TAKAFUMI·Filed 2011·Granted Apr 29, 2014·4 cites·7 claims
- 4767US8547722B2Integrated circuit device and electronic instrumentITO SATORU·Filed 2011·Granted Oct 1, 2013·2 cites·18 claims
- 4867US7986541B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Jul 26, 2011·1 cites·17 claims
- 4967US7616520B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2005·Granted Nov 10, 2009·1 cites·15 claims
- 5066US7613066B2Integrated circuit device and electronic instrumentSEIKO EPSON CORP·Filed 2006·Granted Nov 3, 2009·1 cites·10 claims
Showing the top 50 of 143 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Takashi Kumagai files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →