Inventor · disambiguated record
Naohiko Takahashi
Also filed as: TAKAHASHI NAOHIKO
21 granted patents·3 pending applications·1,015 citations·filing 1984–2022
96Inventor score
Files withHITACHI LTD14HITACHI INDUSTRIAL PRODUCTS LTD4EXEDY CORP2HITACHI PLANT TECHNOLOGIES LTD1MAGARA YOHEI1
Top patents by PatentIndex Score
24 records- 0198US6462492B1Position-sensorless controlling method of synchronous motorHITACHI LTD·Filed 2000·Granted Oct 8, 2002·147 cites·13 claims
- 0298US6396229B1Method of estimating a rotor position of synchronous motor, method of controlling synchronous motor with no position sensor and a controller of synchronous motorHITACHI LTD·Filed 2000·Granted May 28, 2002·259 cites·24 claims
- 0397US5980218AMulti-stage compressor having first and second passages for cooling a motor during load and non-load operationHITACHI LTD·Filed 1997·Granted Nov 9, 1999·111 cites·17 claims
- 0495US6047461ARotor for permanent magnet excited, high-speed electric rotary machine, manufacturing method of the same and electric rotary machine including the sameHITACHI LTD·Filed 1998·Granted Apr 11, 2000·112 cites·21 claims
- 0592US6111333AMagnetic bearing, rotating machine mounting the same, and method for driving rotating machineHITACHI LTD·Filed 1999·Granted Aug 29, 2000·88 cites·9 claims
- 0687US5576587AHigh-speed rotor and controller for controlling magnetic bearings used thereforHITACHI LTD·Filed 1995·Granted Nov 19, 1996·45 cites·8 claims
- 0785US6196809B1Two-stage centrifugal compressorHITACHI LTD·Filed 1998·Granted Mar 6, 2001·60 cites·9 claims
- 0880US8960009B2Apparatus and method for measuring vibration characteristicsTAKAHASHI NAOHIKO·Filed 2012·Granted Feb 24, 2015·6 cites·3 claims
- 0979US6369478B1Permanent-magnet-type electric rotating machine and air compressor and generator using the sameHITACHI LTD·Filed 2001·Granted Apr 9, 2002·24 cites·33 claims
- 1077US5256952AMagnetic bearing control method and apparatusHITACHI LTD·Filed 1992·Granted Oct 26, 1993·32 cites·10 claims
- 1173US6692224B2Turbo compressorHITACHI LTD·Filed 2002·Granted Feb 17, 2004·20 cites·16 claims
- 1272US11255377B2Tilting-pad-type journal bearingHITACHI INDUSTRIAL PRODUCTS LTD·Filed 2017·Granted Feb 22, 2022·2 cites·11 claims
- 1369US4569963AAdhesive composition for bonding fibers to rubberNIPPON ZEON CO·Filed 1984·Granted Feb 11, 1986·20 cites·13 claims
- 1467US5486729AMethod and apparatus for controlling a magnetic bearingHITACHI LTD·Filed 1993·Granted Jan 23, 1996·23 cites·33 claims
- 1567US5408875ABalancing method for flexible rotor and a balancer applicable to the balancing methodHITACHI LTD·Filed 1992·Granted Apr 25, 1995·31 cites·10 claims
- 1660US9004857B2Barrel-shaped centrifugal compressorMAGARA YOHEI·Filed 2011·Granted Apr 14, 2015·2 cites·8 claims
- 1754US5491396AMagnetic bearing apparatus and rotating machine having such an apparatusHITACHI LTD·Filed 1994·Granted Feb 13, 1996·16 cites·9 claims
- 1850US2010034646A1Centrifugal compressorHITACHI PLANT TECHNOLOGIES LTD·Filed 2009·Application pending·0 cites
- 1949US11204062B2Tilting pad journal bearing and rotary machine using sameHITACHI INDUSTRIAL PRODUCTS LTD·Filed 2018·Granted Dec 21, 2021·0 cites·5 claims
- 2047US4992714ABand pass filter device and a method of filtering using such a deviceHITACHI LTD·Filed 1990·Granted Feb 12, 1991·11 cites·26 claims
- 2144US2020355218A1Tilting pad bearing device and rotating machineHITACHI INDUSTRIAL PRODUCTS LTD·Filed 2018·Application pending·0 cites
- 2244US2025035123A1Cause-of-Anomaly Estimation Device for Fluid Machine, Cause-of Anomaly Estimation Method Therefor, and Cause-of-Anomaly Estimation System for Fluid MachineHITACHI INDUSTRIAL PRODUCTS LTD·Filed 2022·Application pending·0 cites
- 2331US6251018B1Dampening disk assembly with spring retaining plateEXEDY CORP·Filed 1999·Granted Jun 26, 2001·2 cites·35 claims
- 2430US6138811ASpline hub and method of manufacturing the spline hubEXEDY CORP·Filed 1999·Granted Oct 31, 2000·4 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when Naohiko Takahashi 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 →