Inventor · disambiguated record
Keizo Matsui
Also filed as: MATSUI KEIZO
12 granted patents·2 pending applications·748 citations·filing 1988–2006
94Inventor score
Top patents by PatentIndex Score
14 records- 0197US4830508AControlling method and a measuring mixer for liquids and powdersFUJI PHOTO FILM CO LTD·Filed 1988·Granted May 16, 1989·153 cites·29 claims
- 0294US6822417B2Synchronous reluctance motor control deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Nov 23, 2004·74 cites·21 claims
- 0392US6512341B2Apparatus and method for driving a brushless motorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jan 28, 2003·57 cites·25 claims
- 0492US5555894AForce sensation exhibiting device, data input device and data input equipmentMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Sep 17, 1996·165 cites·20 claims
- 0589US7669430B2Heat pump apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2005·Granted Mar 2, 2010·15 cites·7 claims
- 0689US4880142APowder weighing mixer and method thereofFUJI PHOTO FILM CO LTD·Filed 1988·Granted Nov 14, 1989·51 cites·6 claims
- 0786US5646499AInverter control apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Jul 8, 1997·75 cites·17 claims
- 0882US4976377ALiquid and powder measuring apparatusFUJI PHOTO FILM CO LTD·Filed 1988·Granted Dec 11, 1990·50 cites·11 claims
- 0978US5778885AForce sensation exhibiting device data input device and data input equipmentMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Jul 14, 1998·39 cites·4 claims
- 1076US4872763AMethod of and apparatus for measuring liquidFUJI PHOTO FILM CO LTD·Filed 1988·Granted Oct 10, 1989·31 cites·35 claims
- 1161US6278910B1Compressor driving apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Aug 21, 2001·29 cites·20 claims
- 1257US7574873B2Inverter device and air conditioner using inverter devicePANASONIC CORP·Filed 2003·Granted Aug 18, 2009·9 cites·12 claims
- 1351US2007101735A1Heat pump apparatus using expanderMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2006·Application pending·0 cites
- 1445US2009282845A1Expander and heat pump using the expanderMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2006·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →