Inventor · disambiguated record
Keiji Akamatsu
Also filed as: AKAMATSU KEIJI
19 granted patents·7 pending applications·92 citations·filing 1976–2017
91Inventor score
Files withPANASONIC IP MAN CO LTD10AKAMATSU KEIJI6MURATA MITSUHIRO2IBARAKI HIROSHI1MATSUSHITA ELECTRIC INDUSTRIAL CO LTD1
Top patents by PatentIndex Score
26 records- 0185US9487098B2Power conversion apparatusPANASONIC IP MAN CO LTD·Filed 2015·Granted Nov 8, 2016·8 cites·18 claims
- 0284US7274116B2direct-current power supply and battery-powered electronic apparatus equipped with the power supplyMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Sep 25, 2007·59 cites·17 claims
- 0382US9667159B2Power conversion apparatus including a transformer, an invertor circuit and a plurality of switching devices controlled by a controllerPANASONIC IP MAN CO LTD·Filed 2015·Granted May 30, 2017·5 cites·33 claims
- 0479US9866135B2Power conversion device including primary inverter, transformer, secondary converterPANASONIC IP MAN CO LTD·Filed 2017·Granted Jan 9, 2018·3 cites·12 claims
- 0575US10924024B2Regenerative power conversion system with inverter and converterPANASONIC IP MAN CO LTD·Filed 2017·Granted Feb 16, 2021·3 cites·15 claims
- 0675US8508437B2Plasma display device having a protective layer including a base protective layer and a particle layerMURATA MITSUHIRO·Filed 2009·Granted Aug 13, 2013·3 cites·7 claims
- 0772US9543858B2Semiconductor device and inverter using samePANASONIC IP MAN CO LTD·Filed 2014·Granted Jan 10, 2017·3 cites·19 claims
- 0865US9287790B2Electric power converterPANASONIC IP MAN CO LTD·Filed 2014·Granted Mar 15, 2016·3 cites·20 claims
- 0961US9866129B2Power conversion device including primary inverter, transformer, secondary converter, and controllerPANASONIC IP MAN CO LTD·Filed 2017·Granted Jan 9, 2018·1 cites·11 claims
- 1054US8232983B2Method for driving plasma display panel, and plasma display deviceOGAWA KENJI·Filed 2008·Granted Jul 31, 2012·0 cites·4 claims
- 1153US8482490B2Plasma display device having a protective layer including a base protective layer and a particle layerMURATA MITSUHIRO·Filed 2009·Granted Jul 9, 2013·0 cites·12 claims
- 1253US8384622B2Plasma display panel drive circuit and plasma display devicePANASONIC CORP·Filed 2007·Granted Feb 26, 2013·0 cites·13 claims
- 1349US8212745B2Method for driving a plasma display panel using subfield groupsTAKEDA MINORU·Filed 2008·Granted Jul 3, 2012·0 cites·1 claims
- 1446US8207913B2Plasma display device and method for controlling an amplitude of a waveform used for driving a plasma display panel based on temperatureIBARAKI HIROSHI·Filed 2008·Granted Jun 26, 2012·0 cites·4 claims
- 1545US8212746B2Method for driving a plasma display panel by using a holding period between subfield groupsAKAMATSU KEIJI·Filed 2008·Granted Jul 3, 2012·0 cites·4 claims
- 1643US2009244053A1Method for driving plasma display panel and plasma display apparatusAKAMATSU KEIJI·Filed 2007·Application pending·0 cites
- 1741US9548676B2Power conversion apparatusPANASONIC IP MAN CO LTD·Filed 2015·Granted Jan 17, 2017·0 cites·4 claims
- 1841US2010013819A1Plasma display panel apparatus driving method and plasma display panel apparatusAKAMATSU KEIJI·Filed 2006·Application pending·0 cites
- 1940US4064777ACircuit for preferentially selecting highest and lowest tonesROLAND CORP·Filed 1976·Granted Dec 27, 1977·4 cites·4 claims
- 2040US2009015520A1Plasma display panel apparatus and method for driving the sameAKAMATSU KEIJI·Filed 2006·Application pending·0 cites
- 2140US2009009436A1Plasma display panel device and drive method thereofAKAMATSU KEIJI·Filed 2006·Application pending·0 cites
- 2239US2012050253A1Method for driving plasma display panel and plasma display deviceSAKAI YUICHI·Filed 2010·Application pending·0 cites
- 2338US9543823B2Power conversion apparatus having a switching circuit unit that includes a switching device and an auxiliary switching devicePANASONIC IP MAN CO LTD·Filed 2015·Granted Jan 10, 2017·0 cites·6 claims
- 2436US2012075283A1Plasma display panel drive method and plasma display deviceYOSHIHAMA YUTAKA·Filed 2010·Application pending·0 cites
- 2534US2012280963A1Plasma display panel driving method and plasma display deviceAKAMATSU KEIJI·Filed 2011·Application pending·0 cites
- 2631US9431917B2Switching power supply including a rectifier circuit having switching elements, and electric power converterPANASONIC IP MAN CO LTD·Filed 2015·Granted Aug 30, 2016·0 cites·7 claims
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