LexDanaLexDanabeta
Inventor

Youhei Ishikawa

Inventor
Kyoto, JP

Overview

72→
Patents
1977–2019
Patent span
Electricity
Primary field (CPC H)

Patents· 72 as inventor

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

H01Pprimary
H01PWaveguides51%
F16HGearing6%
H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner6%
G01SRadio direction-finding5%
H03HImpedance networks, e.g. resonant circuits5%
Y10TTechnical subjects covered by former us classification5%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for4%
G01RMeasuring electric variables4%
G10KSound-producing devices4%
H01QAntennas, i.e. radio aerials3%
PatentTitleYear
10,323,744Control device for continuously variable transmission20199,087,505'Ultra-light sound insulator'20158,637,145'Ultra-light sound insulator'20148,532,893'Automatic transmission'20138,194,879'Ultra-light sound insulator'20128,158,246'Ultralight soundproof material'20127,412,907'Range recognition apparatus for automatic transmission'20087,331,900'Shift control apparatus and method for continuously variable transmission'20087,229,372'Slippage prevention apparatus of belt-drive continuously variable transmission for automotive vehicle'20077,169,070'Transmission controller of V-belt type continuously variable automatic transmission'20076,362,696'Device with a nonradiative dielectric waveguide with coupling gap'20026,239,757'Communication module for a means of transportation'20016,218,916'Electromagnetically coupling nonradiative dielectric waveguides'20016,148,221'Thin film multilayered electrode of high frequency electromagnetic field coupling'20006,008,771'Antenna with nonradiative dielectric waveguide'19995,825,268'Device with a nonradiative dielectric waveguide'19985,757,331'Leakage dielectric waveguide and plane antenna using said leakage dielectric waveguide'19985,724,013'High-frequency integrated circuit'19985,604,469'High-frequency integrated circuit'19975,600,289'Measuring jig used for evaluation of a device with a nonradiative dielectric waveguide'19975,523,725'Signal-to-noise enhancer'19965,473,296'Nonradiative dielectric waveguide and manufacturing method thereof'19955,408,690'Antenna supervising apparatus comprising a standing wave ratio measuring unit'19955,379,009'Active-type band-pass filter'19955,325,077'TE.sub.101 triple mode dielectric resonator apparatus'19945,291,160'Filter arrangement including a non-reversible circuit element, a band-pass filter, and an active circuit'19945,235,294'Auto-tuned apparatus for band-pass filter'19935,229,729'Radio frequency signal combining/sorting apparatus'19935,184,096'Parallel connection multi-stage band-pass filter comprising resonators with impedance matching means capacitively coupled to input and output terminals'19935,159,294'Non-reciprocal circuit element'19925,132,651'Filter apparatus'19925,119,034'Method of measuring dielectric material constants and measuring device employed therefor'19925,097,236'Parallel connection multi-stage band-pass filter'19925,049,842'Dielectric resonator having a cutout portion for receiving an unitary tuning element conforming to the cutout shape'19914,996,506'Band elimination filter and dielectric resonator therefor'19914,942,377'Rod type dielectric resonating device with coupling plates'19904,916,417'Microstripline filter'19904,902,991'Radio frequency signal combining/sorting device'19904,839,773'Dielectric filter'19894,821,006'Dielectric resonator apparatus'19894,816,788'High frequency band-pass filter'19894,740,765'Dielectric filter'19884,733,208'Dielectric filter having impedance changing means coupling adjacent resonators'19884,728,913'Dielectric resonator'19884,727,342'Dielectric resonator'19884,721,931'Stripline filter'19884,706,052'Dielectric resonator'19874,692,727'Dielectric resonator device'19874,639,699'Dielectric resonator comprising a resonant dielectric pillar mounted in a conductively coated dielectric case'19874,636,759'Electrical trap construction'19874,623,857'Dielectric resonator device'19864,613,838'Dielectric resonator'19864,546,334'Electrical filter device'19854,423,397'Dielectric resonator and filter with dielectric resonator'19834,398,164'Coaxial resonator'19834,342,972'Microwave device employing coaxial resonator'19824,325,035'Oscillator using dielectric resonator'19824,321,560'Oscillator using dielectric resonator'19824,276,525'Coaxial resonator with projecting terminal portion and electrical filter employing a coaxial resonator of that type'19814,245,198'High frequency filter device'19814,223,287'Electrical filter employing transverse electromagnetic mode coaxial resonators'19804,200,847'Rectangular branching filter having plurality of rod members for fine impedance matching'19804,184,130'Filter devices incorporating dielectric resonators and leakage cable'19804,179,673'Interdigital filter'19794,151,494'Electrical filter'19794,143,344'Microwave band-pass filter provided with dielectric resonator'19794,142,164'Dielectric resonator of improved type'19794,138,652'Dielectric resonator capable of suppressing spurious mode'19794,136,320'Method of constructing dielectric resonator unit and dielectric resonator unit produced thereby'19794,121,181'Electrical branching filter'19784,102,696'Dielectric ceramic composition for high frequencies'19784,028,652'Dielectric resonator and microwave filter using the same'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–2002Patents assigned to MURATA MANUFACTURING CO (62)· patent assignee history
1977–2002Based in Kyoto, JP· patent location history
1988–2001Based in Nagaokakyo, JP· patent location history
2007–2019Patents assigned to JATCO LTD (6)· patent assignee history
2007–2013Based in Kanagawa, JP· patent location history
2012–2014Patents assigned to ISHIKAWA YOUHEI (4)· patent assignee history
2012–2015Patents assigned to TAKEHIRO CO LTD (4)· patent assignee history
2012–2014Patents assigned to ISHIKAWA MASAKI (3)· patent assignee history
2012–2014Based in Anjyo, JP· patent location history
2019Based in Sagamihara, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MURATA MANUFACTURING CO621977–2002
JATCO LTD62007–2019
ISHIKAWA YOUHEIself42012–2014
TAKEHIRO CO LTD42012–2015
ISHIKAWA MASAKI32012–2014
Locations
LocationPatentsSpan
Kyoto, JP471977–2002
Nagaokakyo, JP151988–2001
Kanagawa, JP52007–2013
Anjyo, JP32012–2014
Sagamihara, JP12019