Assignee
SEIKO SEIKI KK
JP·125 granted patents·2,310 citations·filing 1974–2000
Top patents by PatentIndex Score
125 records- 0196US4045919AHigh speed grinding spindleSEIKO SEIKI KK·Filed 1976·Granted Sep 6, 1977·106 cites·11 claims
- 0294US5093754AControl system for a magnetic levitation bodySEIKO SEIKI KK·Filed 1989·Granted Mar 3, 1992·71 cites·8 claims
- 0393US4137997ALubricating and cooling system for spindle bearing assemblySEIKO SEIKI KK·Filed 1977·Granted Feb 6, 1979·38 cites·10 claims
- 0492US6158225AAutomotive air-conditioning apparatusSEIKO SEIKI KK·Filed 1998·Granted Dec 12, 2000·86 cites·21 claims
- 0592US5027280AMachining apparatus having a main spindle supported by magnetic bearingsSEIKO SEIKI KK·Filed 1988·Granted Jun 25, 1991·74 cites·17 claims
- 0687US4609332ATurbo-molecular pumpSEIKO SEIKI KK·Filed 1983·Granted Sep 2, 1986·64 cites·6 claims
- 0786US5760510AMagnetic bearing deviceSEIKO SEIKI KK·Filed 1995·Granted Jun 2, 1998·44 cites·15 claims
- 0886US5256965AQuality inspecting method and apparatus for detecting defects in magnetic disks by dividing a plurality of concentric tracks into numbered sectorsSEIKO SEIKI KK·Filed 1991·Granted Oct 26, 1993·39 cites·9 claims
- 0985US5820104AVertical transfer system for a vacuum chamber and gate valve assemblySEIKO SEIKI KK·Filed 1996·Granted Oct 13, 1998·85 cites·23 claims
- 1084US5166920ADisk clamp apparatusSEIKO SEIKI KK·Filed 1990·Granted Nov 24, 1992·37 cites·6 claims
- 1184US4118900AMethod for controlling grinding processSEIKO SEIKI KK·Filed 1977·Granted Oct 10, 1978·32 cites·4 claims
- 1282US5804896AHigh speed spindle motor and apparatus equipped with high speed spindle motorSEIKO SEIKI KK·Filed 1995·Granted Sep 8, 1998·54 cites·19 claims
- 1382US4239445APositioning apparatus for transferring palletsSEIKO SEIKI KK·Filed 1977·Granted Dec 16, 1980·35 cites·2 claims
- 1481US4163313ATransfer machineSEIKO SEIKI KK·Filed 1977·Granted Aug 7, 1979·31 cites·3 claims
- 1580US6184640B1DC brushless motor, magnetic bearing device and turbomolecular pump deviceSEIKO SEIKI KK·Filed 1999·Granted Feb 6, 2001·48 cites·14 claims
- 1679US4116506APreloaded bearingSEIKO SEIKI KK·Filed 1977·Granted Sep 26, 1978·27 cites·5 claims
- 1778US5639206ATransferring deviceSEIKO SEIKI KK·Filed 1995·Granted Jun 17, 1997·66 cites·19 claims
- 1878US4956945AInternal grinderSEIKO SEIKI KK·Filed 1989·Granted Sep 18, 1990·47 cites·24 claims
- 1978US4616448AAutomatic work loading device for use in grinding machineSEIKO SEIKI KK·Filed 1984·Granted Oct 14, 1986·18 cites·12 claims
- 2078US4505074AGrinding machine control system for intermittently measuring workpiece sizeSEIKO SEIKI KK·Filed 1982·Granted Mar 19, 1985·25 cites·6 claims
- 2177US5191811ADamper device for a motorSEIKO SEIKI KK·Filed 1991·Granted Mar 9, 1993·36 cites·4 claims
- 2276US5280395AHard disc track defect detecting apparatusSEIKO SEIKI KK·Filed 1991·Granted Jan 18, 1994·27 cites·20 claims
- 2376US4219972AControl apparatus for a grinding machineSEIKO SEIKI KK·Filed 1978·Granted Sep 2, 1980·16 cites·6 claims
- 2472US6163952AMethod of manufacturing armature of motor using hoop memberSEIKO SEIKI KK·Filed 1997·Granted Dec 26, 2000·27 cites·34 claims
- 2572US4839550AControlled type magnetic bearing deviceSEIKO SEIKI KK·Filed 1985·Granted Jun 13, 1989·30 cites·3 claims
- 2671US4019288AGrinding method and apparatusSEIKO SEIKI KK·Filed 1975·Granted Apr 26, 1977·14 cites·8 claims
- 2770US4683408AStepping motor control apparatusSEIKO SEIKI KK·Filed 1985·Granted Jul 28, 1987·26 cites·14 claims
- 2869US6208051B1Spindle apparatusSEIKO SEIKI KK·Filed 1995·Granted Mar 27, 2001·24 cites·16 claims
- 2969US5973468AMagnetic bearing devicesSEIKO SEIKI KK·Filed 1997·Granted Oct 26, 1999·23 cites·10 claims
- 3069US4085554AMethod to dress a grinding wheelSEIKO SEIKI KK·Filed 1976·Granted Apr 25, 1978·13 cites·4 claims
- 3168US5024025AControl system of grinding machineSEIKO SEIKI KK·Filed 1989·Granted Jun 18, 1991·17 cites·5 claims
- 3267US4868805AInspection apparatusSEIKO SEIKI KK·Filed 1987·Granted Sep 19, 1989·15 cites·16 claims
- 3366US5284411AConveyor for conveying workpieces in a vacuum chamberSEIKO SEIKI KK·Filed 1992·Granted Feb 8, 1994·40 cites·13 claims
- 3466US4636904AHermetically sealed magnetic disk cartridgeSEIKO SEIKI KK·Filed 1984·Granted Jan 13, 1987·13 cites·3 claims
- 3565US5821647ASpindle motorSEIKO SEIKI KK·Filed 1996·Granted Oct 13, 1998·28 cites·24 claims
- 3665US5081882ADamper device for a motorSEIKO SEIKI KK·Filed 1990·Granted Jan 21, 1992·18 cites·16 claims
- 3765US4867658ARotary vane compressor having pressure-biased vanesSEIKO SEIKI KK·Filed 1982·Granted Sep 19, 1989·25 cites·16 claims
- 3865US4265054AInternal grinding machineSEIKO SEIKI KK·Filed 1978·Granted May 5, 1981·13 cites·6 claims
- 3964US5288199ATransporting device of magnetically floating typeSEIKO SEIKI KK·Filed 1992·Granted Feb 22, 1994·36 cites·11 claims
- 4064US4658944ADisc clutch mechanism for a magnetic disc apparatus of cartridge typeSEIKO SEIKI KK·Filed 1985·Granted Apr 21, 1987·17 cites·14 claims
- 4164US4642500AControl arrangement for magnetic bearing apparatusSEIKO SEIKI KK·Filed 1986·Granted Feb 10, 1987·22 cites·2 claims
- 4263US3964210AGrinding apparatusSEIKO SEIKI KK·Filed 1974·Granted Jun 22, 1976·17 cites·4 claims
- 4361US4095377AMethod to compensate infeed for the error caused by the outer diameter error of a workpiece in a centerless internal grinderSEIKO SEIKI KK·Filed 1977·Granted Jun 20, 1978·10 cites·4 claims
- 4460US5133158AControl system of grinding machineSEIKO SEIKI KK·Filed 1990·Granted Jul 28, 1992·21 cites·4 claims
- 4560US4117634AControlling method for a grinding machineSEIKO SEIKI KK·Filed 1977·Granted Oct 3, 1978·10 cites·5 claims
- 4660US4111500ASealing structure for a bearingSEIKO SEIKI KK·Filed 1977·Granted Sep 5, 1978·9 cites·4 claims
- 4759US6598288B1Armature of motor, manufacturing method of the same and motor using the same and motor having the sameSEIKO SEIKI KK·Filed 2000·Granted Jul 29, 2003·6 cites·20 claims
- 4859US5666013AMagnetic bearingSEIKO SEIKI KK·Filed 1993·Granted Sep 9, 1997·17 cites·11 claims
- 4958US4471577ADouble spindle grinding machineSEIKO SEIKI KK·Filed 1982·Granted Sep 18, 1984·9 cites·9 claims
- 5057US5356277AVane type gas compressorSEIKO SEIKI KK·Filed 1993·Granted Oct 18, 1994·19 cites·12 claims
Showing the top 50 of 125 patent records by PatentIndex Score.
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