Inventor

Kunio Miyashita

Inventor

Hitachi, JP

Overview

1976–2014

Patent span

Physics

Primary field (CPC G)

Patents· 71 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G01Dprimary

G01DMeasuring not specially adapted for a specific variable19%

H02KDynamo-electric machines16%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters14%

G01PMeasuring linear or angular speed, acceleration, deceleration, or shock9%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%

A47LDomestic washing or cleaning7%

G05BControl or regulating systems in general4%

H03MCoding4%

G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure2%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications2%

PatentTitleYear

8,847,585'Magnetic absolute encoder and motor'2014 8,400,096'Magnetic encoder and actuator'2013 8,368,392'Magnetic encoder and method of detecting absolute rotational position'2013 8,159,096'Apparatus for detecting position of rotation of motor'2012 7,994,749'Multiple-rotation absolute-value encoder of geared motor'2011 7,498,914'Method for magnetizing ring magnet and magnetic encoder'2009 7,375,487'Geared motor'2008 7,196,442'Motor encoder'2007 7,023,203'Absolute magnetic encoder'2006 6,817,267'Actuator having a wave gear reduction drive'2004 6,665,102'Galvanometer-type scanner'2003 5,381,584'Vacuum cleaner'1995 5,294,872'Method and apparatus for operating vacuum cleaner'1994 RE034443'Apparatus magnetically detecting position or speed of moving body utilizing bridge circuit with series connected MR elements'1993 5,243,732'Vacuum cleaner with fuzzy logic control'1993 5,239,490'Device for detecting rotation of rotary shaft and rotation controlling apparatus using the same'1993 RE034355'Magneto resistive sensor for detecting movement of a rotating body'1993 5,231,344'Control apparatus for electric generator'1993 RE034286'Method and apparatus for operating vacuum cleaner'1993 5,166,585'Motor control apparatus for an electric vacuum cleaner'1992 5,101,148'Electric motor actuator'1992 5,075,607'Method and apparatus for operating vacuum cleaner'1991 5,038,065'Permanent magnet reversible synchronous motor'1991 5,023,924'Speed control apparatus for movable equipment'1991 5,019,773'Method and apparatus for detecting positions and/or speed of a moving body using two phase signals'1991 5,019,776'Magnetic position detection apparatus having two magnetic recording medium tracks with magnetoresistors arranged in a bridge circuit so as to eliminate even order harmonic distortion'1991 4,983,895'Method and apparatus for operating vacuum cleaner'1991 4,983,893'Actuator with stepping motion function'1991 4,980,617'Speed control apparatus of movable equipment'1990 4,958,406'Method and apparatus for operating vacuum cleaner'1990 4,945,268'Permanent magnet type linear pulse motor'1990 4,939,435'Torque detecting apparatus'1990 4,922,175'Position/speed detection method and apparatus'1990 4,918,346'Low ripple-torque permanent magnet brushless motor'1990 4,914,361'Method and apparatus for controlling the speed of moving body'1990 4,904,937'Apparatus for magnetically detecting positions with minimum length magnetic information units recorded on a plurality of magnetic tracks'1990 4,890,024'Low-speed high-torque motor'1989 4,880,474'Method and apparatus for operating vacuum cleaner'1989 4,874,053'Torque detecting apparatus'1989 4,857,786'Structure of stepping motor and method of driving the stepping motor'1989 4,855,652'Speed control apparatus for a brushless direct current motor'1989 4,818,939'Apparatus for magnetically detecting position or speed or moving body utilizing bridge circuit with series connected MR elements'1989 4,786,870'Magnetic sensor for magnetically detecting the position of a movable body'1988 4,766,376'Magnetic position detector for detecting an absolute position of a movable member'1988 4,713,613'Device for magnetically detecting displacement of non-magnetic movable member'1987 4,707,695'Magnetic position sensor'1987 4,694,688'Crank angle sensor'1987 4,678,971'Linear motor and control method thereof'1987 4,677,377'Position-detecting sensor for detecting position of a moving object utilizing magnetism'1987 4,672,253'Permanent magnet electrical machine with reduced cogging'1987 4,638,225'Method and apparatus therefor in motor speed control'1987 4,628,314'Method and apparatus for detecting position and velocity of moving body'1986 4,628,259'Magneto resistive sensor for detecting movement of a rotating body'1986 4,599,561'Device for detecting the relative and absolute position of a moving body'1986 4,594,548'Multi phase magnetic sensor apparatus for detecting the position of moving member'1986 4,586,152'Method and apparatus for counting an infinite length with a counter of finite length'1986 4,580,084'Method and system for controlling speed of electric motor'1986 4,558,265'Method and apparatus for position control of an electric motor'1985 4,511,827'Apparatus for driving a polyphase brushless motor with a suppressed torque ripple'1985 4,473,786'Method for controlling angular position and apparatus therefor'1984 4,454,438'Synchronized induction motor'1984 4,418,372'Magnetic rotary encoder'1983 4,403,161'Permanent magnet rotor'1983 4,403,187'Magnetic head for sensing the position of a moving member'1983 4,347,536'Rotary cylinder apparatus'1982 4,336,475'Slotless brushless motor'1982 4,309,635'Squirrel-cage rotor having end rings of double structure'1982 4,250,424'Rotor of synchronous machines'1981 4,144,469'Stress protection for permanent magnet type synchronous motor'1979 4,012,679'Method and apparatus for controlling the operation of synchronous motor'1977 3,968,390'Synchronous motor'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1995Patents assigned to HITACHI LTD (57)· patent assignee history

1976–1995Based in Hitachi, JP· patent location history

1990–2014Patents assigned to MIYASHITA KUNIO (5)· patent assignee history

1990Based in Ibaraki-shi, JP· patent location history

2003–2014Patents assigned to HARMONIC DRIVE SYSTEMS (11)· patent assignee history

2003–2013Based in Nagano, JP· patent location history

2006Based in Suntou-gun, JP· patent location history

2008–2014Based in Azumino, JP· patent location history

2012–2013Patents assigned to KOYAMA JUNJI (2)· patent assignee history

2013–2014Patents assigned to KOTO TSUKASA (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	57	1976–1995
HARMONIC DRIVE SYSTEMS	11	2003–2014
MIYASHITA KUNIOself	5	1990–2014
KOTO TSUKASA	2	2013–2014
KOYAMA JUNJI	2	2012–2013

Locations

Location	Patents	Span
Hitachi, JP	59	1976–1995
Nagano, JP	6	2003–2013
Azumino, JP	4	2008–2014
Suntou-gun, JP	1	2006
Ibaraki-shi, JP	1	1990