LexDanaLexDanabeta
Inventor

Masafumi Ito

Inventor
Tokyo, JP

Overview

265→
Patents
1985–2020
Patent span
LOC
Primary field

Patents· 265 as inventor

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

LOC14primary
LOC1455%
F04BPositive-displacement machines for liquids6%
LOC173%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light2%
G01NInvestigating or analysing materials by determining their chemical or physical properties2%
H03MCoding2%
H04BTransmission2%
LOC132%
LOC122%
Y10TTechnical subjects covered by former us classification2%
PatentTitleYear
10,850,567Tire2020D0850412Controller201910,291,161Brushless motor device, image forming apparatus, and control method for controlling brushless motor2019D0847123Handle for speaker201910,259,269Pneumatic tire for motorcycle2019D0831621Microphone controller2018D0810703'Switch cover'20189,762,764'Image forming system'20179,723,166'Image forming system'2017D0791187'Digital mixer'2017D0788741'Amplifier'20179,564,982'Audio control console'2017D0778261'Digital mixer'2017D0778262'Digital mixer'2017D0777085'Motorcycle tire'2017D0769226'Digital mixer'20169,294,126'Cyclic redundancy check circuit and semiconductor device having the cyclic redundancy check circuit'2016D0748607'Digital mixer'2016D0748077'Part of a digital mixer'2016D0742304'Motorcycle tire'2015D0730324'Digital mixer'20159,041,937'Interference measurement device and measurement method'20159,009,563'Cyclic redundancy check circuit and semiconductor device having the cyclic redundancy check circuit'20158,638,034'Multi-micro hollow cathode light source and atomic absorption sepctrometer'20148,627,170'Cyclic redundancy check circuit and semiconductor device having the cyclic redundancy check circuit'2014D0692414'Digital mixer'20138,488,347'Semiconductor device using DC/DC converter'2013D0681544'Motorcycle tire'2013D0680519'Digital mixer'20138,365,309'Memory device'20138,355,520'Music player'20138,351,039'Spectroscopy method and spectroscope'20138,141,501'Method and facility for disposing wet sludge'20128,044,316'Slide operation apparatus and knob therefor'20117,974,111'DC/DC converter and semiconductor device using DC/DC converter'20117,855,788'Spectroscopy method and spectroscope'2010D0616866'Audio mixer'2010D0616868'Audio mixer'2010D0616867'Audio mixer'20107,710,562'Atomic analyzer'20107,712,009'Cyclic redundancy check circuit and semiconductor device having the cyclic redundancy check circuit'2010D0614855'Shoe lace system'2010D0613147'Slider knob'2010D0610574'Audio mixer'2010D0609218'Audio mixer'2010D0609219'Audio mixer'2010D0609220'Audio mixer'2010D0607438'Audio mixer'20107,530,797'Variable displacement compressor'20097,416,330'Method and apparatus for measuring temperature of substrate'2008D0566165'Electronic piano'2008D0565642'Electronic piano'2008D0518086'Musical signal controller'2006D0507589'Electronic drum'2005D0507014'Electronic drum'20056,629,823'Compressors'20036,501,082'Plasma deposition apparatus and method with controller'2002D0459336'Combined radio receiver and digital audio disc player'2002D0458242'Digital audio disc player'2002D0451083'Combined amplifier and tuner'2001D0450670'Digital video disc player'2001D0448354'Digital video disc player'2001D0447469'Digital audio disc player'2001D0445791'Optical disc drive'2001D0444778'Combined amplifier and tuner'2001D0444138'Combined amplifier and tuner'2001D0443868'Combined digital audio disc player, amplifier and tuner'2001D0443606'Digital recording controller'2001D0442937'Combined record player, radio tuner and amplifier'2001D0442608'Sewing machine'2001D0442573'Combined digital audio disc player, radio tuner and amplifier'2001D0441351'Combined digital audio disc player, amplifier and tuner'2001D0439239'Speaker box'2001D0439236'Combined digital audio disc player and tape recorder'2001D0439240'Speaker box'2001D0436942'Combined amplifier and tuner'2001D0436596'Magnetic disc memory'2001D0436347'Control device for electric apparatus'2001D0435833'Control device for electric apparatus'2001D0434749'Combined digital audio disc player, amplifier and tuner'20006,149,757'Laminating apparatus'2000D0433673'Front panel for audio mixer'2000D0432081'Digital-analog converter'2000D0431546'Digital audio disc recorder'2000D0431238'Combined digital audio disc player, amplifier and tuner'20006,112,639'Structure for collecting leaking oil in compressor'2000D0429705'Video tape recorder'2000D0428404'Digital audio disc player'2000D0427989'Digital audio disc player'2000D0427990'Digital audio disc player'2000D0427579'Digital audio disc player'2000D0426824'Tape recorder'2000D0425892'Combined digital audio disc player, radio tuner, amplifier and tape recorder'2000D0425896'Speaker box'2000D0425061'Digital audio disc recorder'2000D0424053'Recording and reproducing machine for telephone or radio communication equipment'2000D0424056'Combined audio mixer and tape recorder'2000D0423499'Combined digital audio disc player, radio tuner, amplifier, tape recorder and record player'2000D0423014'Speaker box'2000D0422593'Speaker box'2000D0421754'Speaker box'2000D0419971'Data recorder'2000D0417669'Combined audio mixer and magnetic disc recorder'1999D0416018'Combined optical disc recording and reproducing apparatus'1999D0415738'Data recorder'1999D0415758'Digital audio disc player'1999D0414768'Tape recorder'1999D0414184'Combined digital audio disc player, radio tuner, amplifier and tape recorder'1999D0413888'Digital audio tape recorder'1999D0411997'Audio mixer'1999D0410923'Digital audio disc player'1999D0409611'Combined digital audio disc player, radio turner, amplifier and tape recorder'1999D0408820'Audio mixer'1999D0408409'Optical disc player'1999D0408408'Digital audio disc player'1999D0408407'Digital audio disc player'1999D0406589'Audio remote controller'1999D0405448'Digital audio disc player'1999D0405085'Combined speaker box and front panel with load horn'1999D0405087'Combined speaker box and front panel with load horn'1999D0402984'Combined audio mixer and tape recorder'1998D0401917'Disk drive'1998D0401586'Audio remote controller'1998D0397197'Air cleaner'1998D0396719'Digital audio tape recorder'1998D0394260'Combined digital audio disc player and tape recorder'1998D0394059'Digital audio tape recorder'1998D0392638'Digital audio disc player'1998D0391957'Optical disc player'1998D0391571'Optical disc player'1998D0391259'Combined tuner and amplifier'1998D0391258'Combined tuner and amplifier'1998D0390234'Speaker box covered by a panel with a load horn'1998D0389128'Optical disc drive'1998D0389147'Combined digital audio disc player, radio tuner, amplifier, and tape recorder'1998D0387760'Combined digital audio disc player, radio tuner, amplifier and tape recorder'1997D0387761'Combined digital audio disc player, radio tuner, amplifier and tape recorder'1997D0386482'Optical disc drive'1997D0385275'Digital audio disc player'1997D0384665'Digital audio discplayer'1997D0384349'Tape recorder'1997D0384356'Combined audio mixer and tape recorder'1997D0384045'Optical disc drive'1997D0383461'Combined amplifier and radio tuner'19975,653,119'Refrigerating system incorporating therein a variable capacity refrigerant compressor'1997D0381658'Combined digital audio disc player, radio tuner, amplifier and tape recorder'1997D0380755'Tape recorder'1997D0378101'Tape cartridge for tape printer'1997D0377176'Speaker box'1997D0374233'Speaker box'19965,556,260'Multiple-cylinder piston type refrigerant compressor'1996D0372915'Combined tuner and amplifier'1996D0371783'Digital audio disc player'1996D0370895'Disk drive unit'19965,517,900'Tiltable swash plate type compressor'1996D0368714'Digital audio tape recorder'19965,501,579'Axial multi-piston compressor having rotary valve for allowing residual part of compressed fluid to escape'1996D0367275'Combined amplifier and radio tuner'1996D0367052'Combined audio mixer and tape recorder'1996D0366471'Disk drive unit'19965,486,098'Swash plate type variable displacement compressor'1996D0365822'Front panel for a combined digital audio disc player, radio receiver, amplifier tape recorder and speakers'1996D0365097'Streaming cassette tape drive for measuring apparatus'1995D0362845'Streaming cassette tape drive for measuring apparatus'1995D0362666'Digital audio tape recorder'1995D0362002'Disk recording/reproducing apparatus'1995D0362012'Word processor'1995D0361566'Video tape recorder'1995D0360883'Data recording and reproducing apparatus'1995D0358378'Disc drive'1995D0358152'Remote controller for video tape recorder'1995D0357917'Remote controller for a disc recording/reproducing unit'1995D0357269'Electronic keyboard musical instrument'1995D0357255'Audio mixer'1995D0356311'Combined audio mixer and tape recorder'19955,380,165'Reciprocating-piston type refrigerant compressor with an improved rotary-type suction-valve mechanism'1995D0353440'Water purifier'19945,368,449'Refrigerant gas guiding mechanism for piston type compressor'1994D0351932'Air cleaner'1994D0350355'Graphic equalizer'1994D0349705'Audio mixer'1994D0349706'Audio mixer'1994D0349288'Combined digital audio disc player and radio receiver'1994D0348446'Combined data recorder and reproducer'19945,318,410'Variable displacement compressor'1994D0347223'Digital audio tape recorder'1994D0345735'Digital audio tape recorder'1994D0345563'Data recorder/reproducer'1994D0345561'Combined tape recorder and amplifier'1994D0345369'Electronic keyboard musical instrument'1994D0345371'Electronic keyboard musical instrument'1994D0344940'Video tape recorder'1994D0343393'Combined digital audio disc player, radio receiver, amplifier and tape recorder'1994D0343348'Knob for electric apparatus'1994D0342255'Loudspeaker box'1993D0341832'Combined amplifier and radio receiver'1993D0340931'Audio mixer'1993D0340716'Digital audio disc player'1993D0339585'Data recording/reproducing apparatus'1993D0339586'Data recording/reproducing apparatus'1993D0339587'Combined digital audio disk player and tape recorder'1993D0339134'Digital audio disc player'1993D0339135'Digital audio disc player'1993D0338671'Streaming cassette tape drive'1993D0338520'Air cleaner'1993D0337753'Synchronization controller for electric machines'1993D0336904'Open reel type tape recorder deck'1993D0335496'Combined data recording and reproducing instrument'1993D0334929'Tape recorder'1993D0334928'Tape recorder'1993D0334931'Tape recorder'1993D0332788'Audio mixer'1993D0331574'Combined disk drive and streaming cassette tape drive'1992D0331048'Front panel for a disc drive'1992D0329051'Digital audio tape recorder'1992D0329050'Digital audio disk player'1992D0328897'Combined tuner and amplifier'1992D0328747'Combined tuner and amplifier'1992D0327890'Tape recorder'1992D0327889'Digital audio disk player'1992D0327688'Combined tuner and amplifier'1992D0326454'Combined audio mixer and tape recorder'1992D0326096'Digital-analog converter'1992D0326093'Open reel type tape recorder deck'1992D0325910'Combined audio mixer and tape recorder'1992D0325737'Audio mixer'1992D0325580'Audio mixer'1992D0325383'Audio mixer'1992D0325205'Open reel type tape recorder deck'1992D0325206'Open reel type tape recorder deck'1992D0325204'Combined audio mixer and tape recorder'1992D0323507'Remote controller for tape recorder'1992D0322964'Streaming cassette tape drive'1992D0322779'Streaming cassette tape drive'1991D0322600'Streaming cassette tape drive'1991D0322431'Streaming cassette tape drive'1991D0322247'Streaming cassette tape drive'1991D0321876'Data recorder/reproducer'1991D0321189'Digital audio disc player'1991D0321194'Combined digital audio disc player, tuner and tape recorder'1991D0321190'Digital audio disc player'1991D0321192'Combined digital audo disc player and tape recorder'1991D0321191'Digital audio disc player'1991D0319237'Tape recorder'1991D0319236'Combined tape player and tuner'1991D0318665'Combined tape player and tuner'1991D0318664'Digital audio disc player'1991D0317918'Musical instrument digital interface controller'1991D0316860'Tape recorder'1991D0315905'Digital audio disc player'1991D0315723'Digital-analog converter'1991D0314562'Streaming cassette tape drive'1991D0314198'Digital audio disc player'1991D0314197'Digital audio disc player'1991D0313997'Remote controller for audio machines'1991D0312825'Tape recorder'1990D0309735'Tape recorder'1990D0304941'Compact disc player'1989D0304829'Combined compact disc player and tape recorder'1989D0300084'Cushioning piece for a shoe sole'1989D0300085'Cushioning piece for a shoe sole'1989D0297932'Video tape recorder'19884,768,295'Sole'1988D0291196'Combined tape recorder and audio mixer'19874,545,331'Auxiliary air supply apparatus for an internal combustion engine'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2002Patents assigned to TEAC CORP (185)· patent assignee history
1987–2017Based in Tokyo, JP· patent location history
1994–2019Patents assigned to YAMAHA CORP (33)· patent assignee history
1994–2003Patents assigned to TOYODA AUTOMATIC LOOM WORKS (10)· patent assignee history
1994–2019Based in Hamamatsu, JP· patent location history
1994–2009Based in Kariya, JP· patent location history
1995–2002Based in Musashino, JP· patent location history
2008–2015Patents assigned to ITO MASAFUMI (13)· patent assignee history
2010–2016Patents assigned to SEMICONDUCTOR ENERGY LAB (7)· patent assignee history
2011–2017Based in Okazaki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TEAC CORP1851987–2002
YAMAHA CORP331994–2019
ITO MASAFUMIself132008–2015
TOYODA AUTOMATIC LOOM WORKS101994–2003
SEMICONDUCTOR ENERGY LAB72010–2016
Locations
LocationPatentsSpan
Tokyo, JP1041987–2017
Musashino, JP831995–2002
Hamamatsu, JP301994–2019
Kariya, JP111994–2009
Okazaki, JP42011–2017