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Inventor

Kenichi Ishizuka

Inventor
Nagaokakyo, JP

Overview

63→
Patents
1998–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 63 as inventor

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

H01Qprimary
H01QAntennas, i.e. radio aerials21%
H03HImpedance networks, e.g. resonant circuits17%
H01FMagnets12%
H04BTransmission9%
B01DSeparation8%
H01PWaveguides5%
Y02CCapture, storage, sequestration or disposal of greenhouse gases [ghg]5%
H04MTelephonic communication3%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds2%
Y10TTechnical subjects covered by former us classification2%
PatentTitleYear
11,128,046Antenna device and electronic equipment202110,950,381Surface-mounted LC device202110,903,812Trap filter and filter circuit202110,903,571Magnetic field coupling element, antenna device, and electronic equipment202110,886,601Electronic device202110,840,873Coil device202010,734,970Phase shifter module, multiplexer/demultiplexer, and communication apparatus202010,628,696Imaging device, object detector and mobile device control system202010,530,322Resonant circuit, band elimination filter, and band pass filter202010,348,265Transformer-type phase shifter, phase-shift circuit, and communication terminal apparatus201910,348,266Impedance conversion circuit, antenna apparatus, and wireless communication apparatus201910,340,877Antenna matching circuit, antenna device, and communication terminal apparatus201910,327,317Mobile wireless terminal201910,305,184Antenna matching circuit, antenna matching module, antenna device and wireless communication device201910,277,192Phase shifter, impedance matching circuit, and communication terminal apparatus201910,263,324Impedance conversion element and communication device201910,181,644Antenna circuit and communication device201910,079,587Phase shifter, impedance matching circuit, multi/demultiplexer, and communication terminal apparatus201810,049,807Laminated coil component and matching circuit201810,038,420Transformer and wireless communication apparatus201810,005,024Acidic-gas separation module20189,975,092Gas separation membrane and gas separation membrane module20189,893,421'Impedance converter circuit and communication terminal device'20189,893,708'Impedance conversion ratio setting method, impedance conversion circuit, and communication terminal apparatus'20189,837,976Impedance converting circuit and communication terminal apparatus20179,812,245'Laminated coil component and matching circuit'20179,724,647'Acidic gas separation module, acidic gas separation device, and telescope prevention plate'20179,711,848'Antenna device and communication terminal apparatus'20179,698,747'Impedance conversion circuit and antenna device'20179,698,831'Transformer and communication terminal device'20179,660,341'Signal line module and communication terminal apparatus'20179,660,671'Transformer and communication terminal device'20179,515,632'Impedance transformation circuit and wireless communication apparatus'20169,498,755'Gas separation membrane, method of producing the same, and gas separating membrane module using the same'20169,457,319'Acidic gas separation laminate and acidic gas separation module provided with laminate'20169,452,384'Acidic gas separation laminate and acidic gas separation module provided with laminate'20169,323,040'Eyepiece lens system and image observation device'20169,298,873'Method of designing impedance transformation circuit'20169,287,629'Impedance conversion device, antenna device and communication terminal device'20169,272,248'Gas separation composite membrane, and gas separating module, gas separation apparatus and gas separation method using the same'20169,264,011'Impedance-matching switching circuit, antenna device, high-frequency power amplifying device, and communication terminal apparatus'20169,248,413'Gas separation composite membrane and method of producing the same, and gas separating module, gas separation apparatus and gas separation method using the same'20169,238,204'Gas separation composite membrane and gas separating module, gas separation apparatus and gas separation method using the same'20169,197,187'Front-end circuit and communication terminal apparatus'20159,153,865'Antenna device and communication terminal apparatus'20159,099,770'Communication terminal device and manufacturing method thereof'20159,065,422'Frequency stabilization circuit, antenna device, and communication terminal apparatus'20159,030,371'Antenna device and communication terminal apparatus'20158,925,737'Crystalline polymer microporous membrane and filtration filter'20158,912,972'Coupling degree adjustment circuit, antenna device, and wireless communication device'20148,754,738'Transformer having high degree of coupling, electronic circuit, and electronic device'20148,739,976'Crystalline polymer microporous membrane, method for producing the same, and filteration filter'20148,723,753'Antenna device and communication terminal apparatus'20148,643,557'Antenna apparatus and radio communication apparatus'20148,573,408'Crystalline polymer microporous membrane, method for producing the same, and filtration filter'20138,508,420'Antenna device and wireless communication apparatus'20138,309,181'Method of manufacturing polymer film'20128,279,121'Antenna device and wireless communication apparatus'20128,199,057'Antenna device and wireless communication apparatus'20127,466,277'Antenna device and wireless communication apparatus'20087,375,695'Antenna and wireless communication device'20085,865,302'Switch knob having illuminated indicator'19995,740,904'Switch assembly with internal electronic components'1998

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2008–2021Patents assigned to MURATA MANUFACTURING CO (44)· patent assignee history
2008Based in Sagamihara, JP· patent location history
2012–2018Patents assigned to FUJIFILM CORP (13)· patent assignee history
2012–2020Patents assigned to ISHIZUKA KENICHI (13)· patent assignee history
2012–2014Patents assigned to KAWAHATA KAZUNARI (4)· patent assignee history
2012–2014Patents assigned to FUJIEDA SHIGEYUKI (3)· patent assignee history
2012–2018Based in Ashigarakami-gun, JP· patent location history
2012–2013Based in Yokohama, JP· patent location history
2014–2021Based in Nagaokakyo, JP· patent location history
2014–2020Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MURATA MANUFACTURING CO442008–2021
FUJIFILM CORP132012–2018
ISHIZUKA KENICHIself132012–2020
KAWAHATA KAZUNARI42012–2014
FUJIEDA SHIGEYUKI32012–2014
Locations
LocationPatentsSpan
Nagaokakyo, JP402014–2021
Ashigarakami-gun, JP102012–2018
Kanagawa, JP52014–2020
Yokohama, JP32012–2013
Sagamihara, JP22008