Inventor · disambiguated record
Isamu Takehara
Also filed as: TAKEHARA ISAMU
21 granted patents·3 pending applications·483 citations·filing 1983–2010
96Inventor score
Top patents by PatentIndex Score
24 records- 0192US6307291B1Hydraulic dynamic bearing and spindle motor and rotary assembly providedSEIKO INSTR INC·Filed 1999·Granted Oct 23, 2001·59 cites·54 claims
- 0290US6371650B1Hydraulic dynamic bearing and spindle motor and rotary assembly providedSEIKO INSTR INC·Filed 1999·Granted Apr 16, 2002·52 cites·46 claims
- 0384US4847526AVariant-pole electric motorNIPPON FERROFLUIDICS KK·Filed 1986·Granted Jul 11, 1989·62 cites·8 claims
- 0483US6176618B1Dynamic pressure bearing, spindle motor using dynamic pressure bearing, and rotary device having the spindle motor as driving sourceSEIKO INSTR INC·Filed 1998·Granted Jan 23, 2001·38 cites·21 claims
- 0582US5804896AHigh speed spindle motor and apparatus equipped with high speed spindle motorSEIKO SEIKI KK·Filed 1995·Granted Sep 8, 1998·54 cites·19 claims
- 0678US4496887ADirect-current brushless motorJAPAN SERVO·Filed 1983·Granted Jan 29, 1985·33 cites·3 claims
- 0776US6354742B1Hydraulic dynamic bearing and spindle motorSEIKO INSTR INC·Filed 2000·Granted Mar 12, 2002·15 cites·8 claims
- 0876US6247848B1Hydraulic dynamic bearing and spindle motor utilizing hydraulic dynamic bearingSEIKO INSTR INC·Filed 2000·Granted Jun 19, 2001·15 cites·25 claims
- 0972US6163952AMethod of manufacturing armature of motor using hoop memberSEIKO SEIKI KK·Filed 1997·Granted Dec 26, 2000·27 cites·34 claims
- 1065US5821647ASpindle motorSEIKO SEIKI KK·Filed 1996·Granted Oct 13, 1998·28 cites·24 claims
- 1163US5270602ACorless motorSEIKO INSTR INC·Filed 1992·Granted Dec 14, 1993·27 cites·10 claims
- 1261US7921547B2Method of magnetizing permanent magnet for a motorSEIKO INSTR INC·Filed 2007·Granted Apr 12, 2011·2 cites·6 claims
- 1359US6598288B1Armature 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
- 1455US7796357B2Information recording and playback apparatus and method of manufacturing the sameSEIKO INSTR INC·Filed 2005·Granted Sep 14, 2010·1 cites·16 claims
- 1552US6040648ASpindle motor and rotator deviceSEIKO INSTR INC·Filed 1999·Granted Mar 21, 2000·19 cites·17 claims
- 1650US2010259122A1Magnetic member, motor device, magnetizing method, and storage deviceTAKEHARA ISAMU·Filed 2010·Application pending·0 cites
- 1747US7307364B2Motor and recording medium drive deviceSEIKO INSTR INC·Filed 2003·Granted Dec 11, 2007·2 cites·9 claims
- 1847US2006255677A1Magnetic member, motor device, magnetizing method and storage deviceTAKEHARA ISAMU·Filed 2006·Application pending·0 cites
- 1943US5394045ABrushless motorSEIKO INSTR INC·Filed 1993·Granted Feb 28, 1995·9 cites·12 claims
- 2041US6036368ADynamic pressure bearing deviceSEIKO SEIKI KK·Filed 1997·Granted Mar 14, 2000·8 cites·14 claims
- 2141US5374867ACoreless motorSEIKO INSTR INC·Filed 1993·Granted Dec 20, 1994·10 cites·10 claims
- 2240US2005174004A1Permanent magnet for motor, motor and magnetizing methodFiled 2003·Application pending·0 cites
- 2338US6371649B1Method for lubricating a fluid dynamic pressure bearingSEIKO INSTR INC·Filed 1999·Granted Apr 16, 2002·10 cites·9 claims
- 2427US5391954ADirect current motorSEIKO INSTR INC·Filed 1993·Granted Feb 21, 1995·6 cites·16 claims
Join the waitlist — get patent alerts
Get an alert when Isamu Takehara 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 →