Inventor · disambiguated record
Yoshikazu Ichiyama
Also filed as: ICHIYAMA YOSHIKAZU
30 granted patents·7 pending applications·1,264 citations·filing 1991–2015
98Inventor score
Top patents by PatentIndex Score
37 records- 0198US6339270B1Motor for driving storage disks, and storage disk drive device provided therewithNIDEC CORP·Filed 2000·Granted Jan 15, 2002·73 cites·27 claims
- 0298US6211592B1Motor for driving storage disksNIDEC CORP·Filed 2000·Granted Apr 3, 2001·85 cites·12 claims
- 0398US6066903AHydrodynamic bearing for use in an electric motor and an electric motor having the hydrodynamic bearingNIDEC CORP·Filed 1999·Granted May 23, 2000·105 cites·34 claims
- 0496US6456458B1Disk-drive motor rotating on a magnetically counterbalanced single hydrodynamic thrust bearingNIDEC CORP·Filed 2001·Granted Sep 24, 2002·74 cites·28 claims
- 0596US6361214B1Hydrodynamic-pressure bearing device and motor provided with the hydrodynamic-pressure bearing deviceNIDEC CORP·Filed 2000·Granted Mar 26, 2002·76 cites·13 claims
- 0695US6493181B1Thrust hydrodynamic bearing, spindle motor provided therewith, and disk drive utilizing the motorNIDEC CORP·Filed 2001·Granted Dec 10, 2002·44 cites·8 claims
- 0795US5707154AHydrodynamic fluid pressure bearingsNIDEC CORP·Filed 1996·Granted Jan 13, 1998·71 cites·35 claims
- 0895US5658080AMotor with a hydro-dynamic bearingNIDEC CORP·Filed 1995·Granted Aug 19, 1997·70 cites·21 claims
- 0994US7567006B2Field controllable rotating electric machine system with flux shunt controlKURA LAB CORP·Filed 2008·Granted Jul 28, 2009·31 cites·30 claims
- 1094US6664687B2Motor having single cone fluid dynamic bearing balanced with shaft end magnetic attractionKURA LAB CORP·Filed 2001·Granted Dec 16, 2003·38 cites·11 claims
- 1194US6404087B1Motor including hydrodynamic bearings with pair of thrust platesNIDEC CORP·Filed 2000·Granted Jun 11, 2002·61 cites·8 claims
- 1294US6246136B1Motor and method for manufacturing the sameNIDEC CORP·Filed 1999·Granted Jun 12, 2001·92 cites·15 claims
- 1393US6059459AHydrodynamic pressure bearingNIDEC CORP·Filed 1998·Granted May 9, 2000·49 cites·11 claims
- 1492US6686674B2Motor having single cone fluid dynamic bearing balanced with magnetic attractionKURA LAB CORP·Filed 2001·Granted Feb 3, 2004·34 cites·17 claims
- 1591US6126320AHydrodynamic pressure bearingNIDEC CORP·Filed 1999·Granted Oct 3, 2000·59 cites·4 claims
- 1690US8373325B2Rotating electric machine systemKURA LAB CORP·Filed 2010·Granted Feb 12, 2013·10 cites·18 claims
- 1787US6664686B2Motor having single cone air dynamic bearing balanced with shaft end magnetic attractionKURA LAB CORP·Filed 2001·Granted Dec 16, 2003·24 cites·9 claims
- 1887US6307293B1Motor having a hydrodynamic pressure bearingNIDEC CORP·Filed 1999·Granted Oct 23, 2001·65 cites·16 claims
- 1986US6250808B1Motor having a plurality of dynamic pressure bearingsNIDEC CORP·Filed 1999·Granted Jun 26, 2001·39 cites·17 claims
- 2085US6034454AMotorNIDEC CORP·Filed 1999·Granted Mar 7, 2000·59 cites·5 claims
- 2182US7999432B2Field controllable rotating electric machine system with magnetic excitation partKURA LAB CORP·Filed 2008·Granted Aug 16, 2011·11 cites·34 claims
- 2278US8242653B2Magnetic flux controllable rotating electric machine systemICHIYAMA YOSHIKAZU·Filed 2009·Granted Aug 14, 2012·9 cites·23 claims
- 2376US6549366B1Rotation-stabilizing ambient gaseous fluid guide for rotary and storage devicesNIDEC CORP·Filed 2000·Granted Apr 15, 2003·11 cites·22 claims
- 2476US5791784AFluid dynamic pressure bearing and motor and magnetic disk apparatus using fluid dynamic pressure bearingNIDEC CORP·Filed 1996·Granted Aug 11, 1998·25 cites·10 claims
- 2564US6036369AFluid dynamic pressure bearing and motor and magnetic disk apparatus using fluid dynamic pressure bearingNIDEC CORP·Filed 1998·Granted Mar 14, 2000·14 cites·6 claims
- 2663US6657343B2Magnetic fluid bearing motor employing porous sleeveKURA LAB CORP·Filed 2001·Granted Dec 2, 2003·8 cites·6 claims
- 2759US5166913AOptical disk device for record and reproduction of additional information besides reproducing of basic informationNEC CORP·Filed 1991·Granted Nov 24, 1992·10 cites·6 claims
- 2857US8207645B2Magnetic flux controllable rotating electric machine systemICHIYAMA YOSHIKAZU·Filed 2009·Granted Jun 26, 2012·2 cites·20 claims
- 2951US5287335AOptical disk device for record and reproduction of additional information besides reproduction of basic oneNEC CORP·Filed 1992·Granted Feb 15, 1994·7 cites·3 claims
- 3046US2009045691A1Field controllable rotating electric machine system with magnetic excitation partKURA LAB CORP·Filed 2008·Application pending·0 cites
- 3144US2006039634A1Fluid dynamic bearing motor attached at both shaft endsKURA LAB CORP·Filed 2005·Application pending·0 cites
- 3244US2006002638A1Fixed shaft type fluid dynamic bearing motorKURA LABORATRIES CORP·Filed 2005·Application pending·0 cites
- 3344US2006039636A1Fluid dynamic bearing motor attached at both shaft endsKURA LAB CORP·Filed 2005·Application pending·0 cites
- 3442US5879084AHydrodynamic bearingNIDEC CORP·Filed 1997·Granted Mar 9, 1999·8 cites·21 claims
- 3542US2006002641A1Fixed shaft type fluid dynamic bearing motorKURA LAB CORP·Filed 2005·Application pending·0 cites
- 3637US2015357891A1Rotating electric machine system and method for controlling induced voltage for the sameICHIYAMA YOSHIKAZU·Filed 2015·Application pending·0 cites
- 3734US2003024122A1Method and apparatus for producing hydrodynamic bearing parts by electrochemical machiningFiled 2002·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →