Assignee
NIHON DENSAN KK
JP·50 granted patents·1,700 citations·filing 1982–1994
Top patents by PatentIndex Score
50 records- 0193US5363003AMotor and circuitry for protecting sameNIHON DENSAN KK·Filed 1992·Granted Nov 8, 1994·91 cites·7 claims
- 0293US5343104AFan motorNIHON DENSAN KK·Filed 1993·Granted Aug 30, 1994·95 cites·16 claims
- 0390US5138209ASpindle motorNIHON DENSAN KK·Filed 1991·Granted Aug 11, 1992·71 cites·5 claims
- 0490US5045738ASpindle motorNIHON DENSAN KK·Filed 1990·Granted Sep 3, 1991·74 cites·16 claims
- 0589US5436519AFan motorNIHON DENSAN KK·Filed 1994·Granted Jul 25, 1995·70 cites·10 claims
- 0687US5428284AMethod of and circuit for starting sensorless motorNIHON DENSAN KK·Filed 1994·Granted Jun 27, 1995·62 cites·3 claims
- 0786US5426548ADisk clamping assembly for a low profile disk drive apparatusNIHON DENSAN KK·Filed 1993·Granted Jun 20, 1995·46 cites·16 claims
- 0884US5225759AStarting and control method for brushless DC motorNIHON DENSAN KK·Filed 1989·Granted Jul 6, 1993·54 cites·4 claims
- 0983US5457588ALow profile hydrodynamic motor having minimum leakage propertiesNIHON DENSAN KK·Filed 1993·Granted Oct 10, 1995·65 cites·16 claims
- 1083US5333079ALow profile hard disk apparatusNIHON DENSAN KK·Filed 1992·Granted Jul 26, 1994·33 cites·13 claims
- 1183US4996613ASpindle motor with non-contact sealNIHON DENSAN KK·Filed 1988·Granted Feb 26, 1991·31 cites·10 claims
- 1281US5235264AMethod of and circuit for starting sensorless motorNIHON DENSAN KK·Filed 1991·Granted Aug 10, 1993·47 cites·14 claims
- 1381US5061868ASpindle motorNIHON DENSAN KK·Filed 1990·Granted Oct 29, 1991·56 cites·13 claims
- 1480US5453890ALow airflow hard disk apparatusNIHON DENSAN KK·Filed 1994·Granted Sep 26, 1995·32 cites·5 claims
- 1580US5214331ALead holder for a spindle motorNIHON DENSAN KK·Filed 1991·Granted May 25, 1993·25 cites·6 claims
- 1678US5347189ASpindle motor with labyrinth sealed bearingNIHON DENSAN KK·Filed 1992·Granted Sep 13, 1994·45 cites·2 claims
- 1777US5256922ASpindle motorNIHON DENSAN KK·Filed 1992·Granted Oct 26, 1993·49 cites·8 claims
- 1877US5160866ASpindle motorNIHON DENSAN KK·Filed 1991·Granted Nov 3, 1992·28 cites·8 claims
- 1976US5357160AIC controlled DC motorNIHON DENSAN KK·Filed 1993·Granted Oct 18, 1994·45 cites·10 claims
- 2076US5245234AMotorNIHON DENSAN KK·Filed 1991·Granted Sep 14, 1993·39 cites·17 claims
- 2176US4980587ASpindle motor with precision bearingsNIHON DENSAN KK·Filed 1989·Granted Dec 25, 1990·31 cites·6 claims
- 2272US5484013AHeat sink fanNIHON DENSAN KK·Filed 1994·Granted Jan 16, 1996·47 cites·7 claims
- 2370US5317225ASpindle motor and disk clamp mechanism used thereinNIHON DENSAN KK·Filed 1991·Granted May 31, 1994·20 cites·4 claims
- 2470US5214326ASpindle motor with magnetic shield for magnetic fluid sealNIHON DENSAN KK·Filed 1991·Granted May 25, 1993·29 cites·2 claims
- 2569US5365458AMotor eccentricity measuring apparatusNIHON DENSAN KK·Filed 1992·Granted Nov 15, 1994·28 cites·11 claims
- 2669US5334895ASpindle motor with the stator core supported by a resin memberNIHON DENSAN KK·Filed 1992·Granted Aug 2, 1994·29 cites·5 claims
- 2767US5402023ASpindle motor and magnetic fluid seal apparatus used thereforNIHON DENSAN KK·Filed 1993·Granted Mar 28, 1995·25 cites·6 claims
- 2863US5459361ASpindle motorNIHON DENSAN KK·Filed 1993·Granted Oct 17, 1995·24 cites·8 claims
- 2963US5009436AMagnetic fluid seal assemblyNIHON DENSAN KK·Filed 1988·Granted Apr 23, 1991·23 cites·9 claims
- 3062US5321572ATransformer bobbinNIHON DENSAN KK·Filed 1992·Granted Jun 14, 1994·19 cites·8 claims
- 3162US5134331ASpindle motorNIHON DENSAN KK·Filed 1991·Granted Jul 28, 1992·22 cites·16 claims
- 3261US5255567ATorque transducerNIHON DENSAN KK·Filed 1991·Granted Oct 26, 1993·25 cites·5 claims
- 3361US5206579ABattery charger and charge controller thereforNIHON DENSAN KK·Filed 1991·Granted Apr 27, 1993·40 cites·9 claims
- 3460US5396159AMethod of starting a motorNIHON DENSAN KK·Filed 1993·Granted Mar 7, 1995·20 cites·21 claims
- 3559US5363028ACircuit and method of driving a DC motorNIHON DENSAN KK·Filed 1992·Granted Nov 8, 1994·19 cites·12 claims
- 3659US5229705AMethod and apparatus for charging a nickel-cadmium batteryNIHON DENSAN KK·Filed 1991·Granted Jul 20, 1993·32 cites·3 claims
- 3758US5291357AMagnetic recording device having reduced electromagnetic interferenceNIHON DENSAN KK·Filed 1991·Granted Mar 1, 1994·14 cites·1 claims
- 3857US5281886AMagnetic disk drive device and spindle motor for use in the sameNIHON DENSAN KK·Filed 1992·Granted Jan 25, 1994·15 cites·1 claims
- 3957US5174025AMethod of manufacturing a hub for a spindle motorNIHON DENSAN KK·Filed 1991·Granted Dec 29, 1992·31 cites·5 claims
- 4054US5381066ASpindle motor with a sealing memberNIHON DENSAN KK·Filed 1993·Granted Jan 10, 1995·16 cites·2 claims
- 4150US5475294ACharge controller for battery chargerNIHON DENSAN KK·Filed 1992·Granted Dec 12, 1995·35 cites·10 claims
- 4249US5452156ASpindle motor with combined pressure relief and adhesive carrying annular recessesNIHON DENSAN KK·Filed 1994·Granted Sep 19, 1995·18 cites·5 claims
- 4349US5250883AMotor drive control apparatusNIHON DENSAN KK·Filed 1992·Granted Oct 5, 1993·12 cites·5 claims
- 4447US5412367ATransformerNIHON DENSAN KK·Filed 1993·Granted May 2, 1995·9 cites·6 claims
- 4547US4458184ABrushless D.C. motor having asymmetrically positioned polesNIHON DENSAN KK·Filed 1982·Granted Jul 3, 1984·18 cites·7 claims
- 4644US5153470ASpindle motorNIHON DENSAN KK·Filed 1991·Granted Oct 6, 1992·12 cites·4 claims
- 4739US5396135AMotorNIHON DENSAN KK·Filed 1994·Granted Mar 7, 1995·9 cites·3 claims
- 4839US5355043ABrushless polyphase DC motorNIHON DENSAN KK·Filed 1992·Granted Oct 11, 1994·9 cites·8 claims
- 4933US5216304ASpindle motor with an improved hubNIHON DENSAN KK·Filed 1991·Granted Jun 1, 1993·6 cites·4 claims
- 5019US5280207ASpindle motor with disk clamping arrangementNIHON DENSAN KK·Filed 1992·Granted Jan 18, 1994·5 cites·2 claims
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