P

Inventor

SAKAMOTO MASAFUMI

JP62 patents
⚠️ This page may combine multiple inventors who share the name “SAKAMOTO MASAFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

JAPAN SERVO

42 patents
US5874795AFeb 23, 1999

Multi-phase permanent-magnet type electric rotating machine

JAPAN SERVO123 citations98
US6329729B1Dec 11, 2001

Hybrid stepping motor

JAPAN SERVO32 citations96
US6121712ASep 19, 2000

Three-phase permanent magnet cascade claw type stepping motor

JAPAN SERVO52 citations96
US6028377AFeb 22, 2000

Three-phase permanent magnet cascade claw type stepping motor

JAPAN SERVO56 citations96
US5854526ADec 29, 1998

Three-phase permanent-magnet electric rotating machine

JAPAN SERVO74 citations96
US5532531AJul 2, 1996

Permanent magnet type brushless motor

JAPAN SERVO77 citations96
US5386161AJan 31, 1995

Permanent magnet stepping motor

JAPAN SERVO92 citations96
US5289064AFeb 22, 1994

Three-phase permanent magnet stepping motor

JAPAN SERVO63 citations96
US4983867AJan 8, 1991

Hybrid-type stepping motor

JAPAN SERVO63 citations96
US4384226AMay 17, 1983

Small-sized electric motor

JAPAN SERVO65 citations96
US7242118B2Jul 10, 2007

Toroidal-coil linear stepping motor, toroidal-coil linear reciprocating motor, cylinder compressor and cylinder pump using these motors

JAPAN SERVO50 citations93
US6765321B2Jul 20, 2004

Three-phase toroidal coil type permanent magnet electric rotating machine

JAPAN SERVO52 citations93
US6670732B2Dec 30, 2003

Magnet type stepping motor

JAPAN SERVO24 citations93
US6504272B2Jan 7, 2003

Multi-phase electric rotating machine having toroidal coils and using method thereof

JAPAN SERVO25 citations93
US6477918B2Nov 12, 2002

Rotary electric machine having coaxial output hollow shaft with reduction gear and slip ring

JAPAN SERVO46 citations93
US6160330ADec 12, 2000

Three-phase stepping motor and driving method therefor

JAPAN SERVO56 citations93
US6051898AApr 18, 2000

Stepping motor having external rotor and electromagnetic-combined-permanent-magnet stator

JAPAN SERVO20 citations93
US5780944AJul 14, 1998

Two-phase permanent-magnet electric rotating machine

JAPAN SERVO33 citations93
US5243246ASep 7, 1993

Connector assembly for a rotary electric machine

JAPAN SERVO35 citations93
US5032747AJul 16, 1991

Stepping motor

JAPAN SERVO31 citations93
US4503368AMar 5, 1985

Permanent magnet type stepping motor

JAPAN SERVO49 citations93
US4499391AFeb 12, 1985

End bracket for motor

JAPAN SERVO31 citations93
US4347457AAug 31, 1982

Permanent magnet type stepping motor

JAPAN SERVO35 citations93
US5410200AApr 25, 1995

Hybrid type stepping motor

JAPAN SERVO65 citations92
US5708310AJan 13, 1998

Permanent magnet type stepping motor

JAPAN SERVO47 citations89
US7274805B2Sep 25, 2007

Method of driving surveillance camera by using rotary electric machine

JAPAN SERVO12 citations84
US6903476B2Jun 7, 2005

Permanent magnet type three-phase stepping motor

JAPAN SERVO15 citations84
US6731027B2May 4, 2004

Three-phase hybrid type stepping motor

JAPAN SERVO13 citations83
US6707178B2Mar 16, 2004

Permanent magnet type twelve-pole stepping motor

JAPAN SERVO13 citations83
US6741006B2May 25, 2004

Magnet type stepping motor

JAPAN SERVO11 citations82
US7145278B2Dec 5, 2006

Permanent magnet type three-phase stepping motor

JAPAN SERVO8 citations74
US6781260B2Aug 24, 2004

Permanent magnet type rotary machine

JAPAN SERVO9 citations74
US6731033B2May 4, 2004

Motor-driven system with stator provided with inductors

JAPAN SERVO10 citations74
USRE38346EDec 16, 2003

Three-phase permanent magnet cascade claw type stepping motor

JAPAN SERVO4 citations74
US6359349B1Mar 19, 2002

Composite type three phase stepping motor

JAPAN SERVO8 citations74
US6320347B1Nov 20, 2001

Method of driving directly a rotary drum in a reproducing machine by a prime mover

JAPAN SERVO11 citations74
US6633105B2Oct 14, 2003

Permanent magnet motor

JAPAN SERVO9 citations73
US6781337B2Aug 24, 2004

Multi-joint type industrial robot

JAPAN SERVO10 citations72
US6548923B2Apr 15, 2003

Two-phase hybrid type stepping motor

JAPAN SERVO8 citations72
US6545376B2Apr 8, 2003

Three-phase hybrid type stepping motor

JAPAN SERVO12 citations72
US7342330B2Mar 11, 2008

Hybrid type double three-phase electric rotating machine

JAPAN SERVO7 citations70
US6281615B1Aug 28, 2001

Stepping motor

JAPAN SERVO1 citations63

JAPAN SERVO COMPANY LTD

2 patents
US6172438B1Jan 9, 2001

Two-phase permanent-magnet electric rotating machine

JAPAN SERVO COMPANY LTD40 citations91
US6225773B1May 1, 2001

Stepping motor and having external rotor and electromagnetic-combined-permanent magnet stator

JAPAN SERVO COMPANY LTD4 citations72

SHARP KK

2 patents
US10775719B2Sep 15, 2020

Duct mechanism and image forming apparatus including the same

SHARP KK3 citations73
US5428801AJun 27, 1995

Data array conversion control system for controlling conversion of data arrays being transferred between two processing systems

SHARP KK8 citations66

ELBEX VIDEO LTD

1 patent
US6628338B1Sep 30, 2003

Direct drive electric motor apparatus incorporating slip ring assembly

ELBEX VIDEO LTD146 citations98

ISUZU MOTORS LTD

1 patent
US6460889B2Oct 8, 2002

Front portion structure of vehicle frame

ISUZU MOTORS LTD52 citations89

NICHIA CORP

1 patent
US9653658B2May 16, 2017

Red phosphor and light emitting device including the same

NICHIA CORP3 citations73

NIPPON PISTON RING CO LTD

1 patent
US9882442B2Jan 30, 2018

Rotating electric machine including rotor arranged with intermediation of air gap

NIPPON PISTON RING CO LTD3 citations66

Showing the top 50 of 62 patents by PatentIndex Score.