Inventor · disambiguated record
Hirokazu Tajima
Also filed as: TAJIMA HIROKAZU
25 granted patents·249 citations·filing 1994–2018
96Inventor score
Files withFUJI ELECTRIC CO LTD16HOYA CORP4ASMO CO LTD1FUJI ELEC FA COMPONENTS & SYS1FUJI ELECTRIC SYSTEMS CO LTD1
Top patents by PatentIndex Score
25 records- 0184US8658285B2Optically clear UV and hydrolysis resistant polyester filmHINTON CARLOS·Filed 2011·Granted Feb 25, 2014·6 cites·31 claims
- 0280US6377018B2Speed sensorless vector control apparatusFUJI ELECTRIC CO LTD·Filed 2001·Granted Apr 23, 2002·28 cites·4 claims
- 0378US10006455B2Drive control apparatusFUJI ELECTRIC CO LTD·Filed 2017·Granted Jun 26, 2018·3 cites·8 claims
- 0476US6932677B2Polishing pad, method of manufacturing glass substrate for use in data recording medium using the pad, and glass substrate for use in data recording medium obtained by using the methodHOYA CORP·Filed 2004·Granted Aug 23, 2005·14 cites·13 claims
- 0575US10252626B2ChargerFUJI ELECTRIC CO LTD·Filed 2016·Granted Apr 9, 2019·3 cites·12 claims
- 0675US7300335B2Glass substrate for data recording medium, manufacturing method thereof and polishing pad used in the methodHOYA CORP·Filed 2004·Granted Nov 27, 2007·18 cites·5 claims
- 0770US7781996B2Speed control device for electric motorFUJI ELECTRIC SYSTEMS CO LTD·Filed 2007·Granted Aug 24, 2010·7 cites·5 claims
- 0869US5828199AVariable speed controller for an induction motorFUJI ELECTRIC CO LTD·Filed 1997·Granted Oct 27, 1998·32 cites·6 claims
- 0964US6404162B1Variable-speed controlling device for use with an induction motorFUJI ELECTRIC CO LTD·Filed 2000·Granted Jun 11, 2002·6 cites·7 claims
- 1062US5532570AVariable speed control apparatus for induction motorFUJI ELECTRIC CO LTD·Filed 1995·Granted Jul 2, 1996·24 cites·18 claims
- 1158US6321606B1Apparatus for calculating torque generated by induction motorFUJI ELECTRIC CO LTD·Filed 1999·Granted Nov 27, 2001·19 cites·6 claims
- 1258US5959429AVariable speed controlling device for induction motorFUJI ELECTRIC CO LTD·Filed 1998·Granted Sep 28, 1999·19 cites·10 claims
- 1357US10333446B2Controller for induction motorFUJI ELECTRIC CO LTD·Filed 2018·Granted Jun 25, 2019·0 cites·5 claims
- 1453US10479219B2Controller for AC electric motorFUJI ELECTRIC CO LTD·Filed 2018·Granted Nov 19, 2019·0 cites·10 claims
- 1553US9593720B2MotorASMO CO LTD·Filed 2015·Granted Mar 14, 2017·0 cites·7 claims
- 1652US5623190AMethod and apparatus for controlling an AC motor and detecting malfunctionsFUJI ELECTRIC CO LTD·Filed 1994·Granted Apr 22, 1997·14 cites·13 claims
- 1751US8222851B2Machine control deviceTAJIMA HIROKAZU·Filed 2009·Granted Jul 17, 2012·2 cites·4 claims
- 1851US7501787B2Method for controlling AC motorFUJI ELEC FA COMPONENTS & SYS·Filed 2006·Granted Mar 10, 2009·3 cites·4 claims
- 1949US6852003B2Method of manufacturing glass substrate for data recording mediumHOYA CORP·Filed 2004·Granted Feb 8, 2005·4 cites·16 claims
- 2049US5859521AVariable speed controller for an AC motorFUJI ELECTRIC CO LTD·Filed 1997·Granted Jan 12, 1999·15 cites·11 claims
- 2148US7059951B2Polishing pad, method of manufacturing glass substrate for use in data recording medium using the pad, and glass substrate for use in data recording medium obtained by using the methodHOYA CORP·Filed 2005·Granted Jun 13, 2006·0 cites·4 claims
- 2247US6075337ASpeed control apparatus for induction motorFUJI ELECTRIC CO LTD·Filed 1999·Granted Jun 13, 2000·13 cites·6 claims
- 2342US5880572AVariable-speed control method and apparatus for AC motorFUJI ELECTRIC CO LTD·Filed 1997·Granted Mar 9, 1999·11 cites·16 claims
- 2438US5734251AControl apparatus for AC motorFUJI ELECTRIC CO LTD·Filed 1996·Granted Mar 31, 1998·8 cites·16 claims
- 2534US10644526B2Charger with inverter and inverter gate drive circuitFUJI ELECTRIC CO LTD·Filed 2016·Granted May 5, 2020·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →