LexDanaLexDanabeta
Inventor

Takashi Yokoyama

Inventor
Tokyo, JP

Overview

168→
Patents
1977–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 168 as inventor

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

H10Dprimary
H10DInorganic electric semiconductor devices14%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1013%
H05KPrinted circuits6%
H10BElectronic memory devices6%
H01LSemiconductor devices5%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h105%
Y10TTechnical subjects covered by former us classification4%
C30BSingle-crystal growth3%
H10NElectric solid-state devices not otherwise provided for3%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%
PatentTitleYear
10,879,299Semiconductor device with transistor in semiconductor substrate and insulated contact plug extending through the substrate202010,703,232Vehicle seat2020D0887154Vehicle seat202010,654,113Cutting method and cutting apparatus202010,615,214Semiconductor device, solid-state imaging device with tantalum oxide layer formed by diffusing a material of an electrode of necessity or a counter electrode202010,615,334Memory cell structure, method of manufacturing a memory, and memory apparatus202010,556,527Vehicle seat202010,369,916Vehicular article-accommodating structure, arm rest, and vehicular seat201910,343,566Vehicle seat201910,319,785Semiconductor device and method of manufacturing same201910,319,775Semiconductor device, solid-state imaging device with tantalum oxide layer formed by diffusing a material of an electrode of necessity or a counter electrode201910,269,867Semiconductor device, memory circuit, method of manufacturing semiconductor device201910,207,332Work holder and work machining method201910,192,925Semiconductor device structure useful for bulk transistor and method of manufacturing same201910,162,469Touch screen201810,049,712Semiconductor device including volatile and non-volatile memory201810,002,907Semiconductor device and method of manufacturing same20189,972,772Memory cell structure, method of manufacturing a memory, and memory apparatus20189,954,031Semiconductor device structure useful for bulk transistor and method of manufacturing same where a substrate extends commonly over a transistor, an element region, and a separation region20189,947,710Semiconductor device, solid-state imaging device with tantalum oxide layer formed by diffusing a material of an electrode of necessity or a counter electrode20189,917,129'Semiconductor device with transistor in semiconductor subtrate and insulated contact plug extending trough the substrate'20189,903,044'Silicon single crystal producing method'20189,837,534Semiconductor device and fabrication method therefor20179,828,859Gas turbine blade with inner and outer cooling holes20179,698,199'Semiconductor device and method of manufacturing same'20179,631,498'Gas turbine blade'20179,595,562'Memory cell structure, method of manufacturing a memory, and memory apparatus'20179,577,005'Semiconductor device and solid-state imaging device with tantalum oxide layer formed by diffusing a material of an electrode of necessity or a counter electrode'20179,412,788'Semiconductor device structure useful for bulk transistor and method of manufacturing the same'20169,407,459'Communication apparatus, communication system, and communication method to transmit and receive Ethernet frames'20169,219,077'Semiconductor device and fabrication method therefor'20159,171,887'Semiconductor device and method of manufacturing same'20159,093,575'Semiconductor device and solid-state imaging device with tantalum oxide layer formed by diffusing a material of an electrode of necessity or a counter electrode'20159,033,623'Tool radius adjusting method in machine tool and machine tool for practicing the method'20158,998,785'Machine tool including tool radius adjusting device'20158,972,988'Remote virtual machine migration port management device and system'20158,906,786'Method for producing single crystal SiC substrate and single crystal SiC substrate produced by the same'20148,881,354'Tool radius adjusting system for boring holder, tool radius adjusting method in machine tool, and machine tool'20148,603,901'Method for producing single crystal SiC substrate and single crystal SiC substrate produced by the same'20138,585,014'Linear solenoid and valve device using the same'20138,563,442'Method for manufacturing nitrogen compound semiconductor substrate and nitrogen compound semiconductor substrate, and method for manufacturing single crystal SiC substrate and single crystal SiC substrate'20138,191,515'V-type internal combustion engine including throttle valve device, and vehicle incorporating same'20128,155,037'Transmitter-receiver'20128,033,270'Fuel distribution apparatus for a V-type engine'20118,031,822'Communication apparatus'20118,014,736'Distortion compensating apparatus, wireless communicating apparatus, and distortion compensating method'20117,821,074'Semiconductor device and method for manufacturing same'20107,733,859'Apparatus and method for packet forwarding in layer 2 network'20107,729,699'Switching center for mobile handover'20107,709,147'Storage battery and production method thereof'20107,691,203'Film forming apparatus'20107,686,398'Seat apparatus for vehicle'20107,602,026'Memory cell, semiconductor memory device, and method of manufacturing the same'20097,532,624'Multicast packet control apparatus'20097,524,371'Method for manufacturing defect-free silicon single crystal'20097,408,143'Previous amplifier circuit, light-receiving amplifier circuit, and optical pickup apparatus having grounded emitter amplifier circuits each with a grounded emitter transistor'20087,388,245'Semiconductor device, method for manufacturing the semiconductor device and portable electronic device provided with the semiconductor device'20087,315,059'Semiconductor memory device and manufacturing method for the same'20087,304,343'Semiconductor memory device and manufacturing method for the same'20077,263,046'Photo-detector amplifier circuit for optical disk device'20077,217,654'Semiconductor device and method of manufacturing the same'20077,213,861'Retractable seat device'20077,141,506'Method for evaluating dependence of properties of semiconductor substrate on plane orientation and semiconductor device using the same'20067,135,726'Semiconductor memory and its production process'20067,133,346'Photo-detector amplifier circuit for optical disk device'20067,079,513'Communication system'20067,061,038'Semiconductor memory device and its production process'20067,060,598'Method for implanting ions into semiconductor substrate'20066,974,173'Vehicle seat apparatus'20056,933,556'Semiconductor memory with gate at least partially located in recess defined in vertically oriented semiconductor layer'20056,919,622'Semiconductor device'20056,870,215'Semiconductor memory and its production process'20056,863,330'Seat apparatus for a vehicle'20056,821,687'Photo mask for fabricating semiconductor device having dual damascene structure'20046,795,414'Communication system'20046,787,913'Ohmic contact plug having an improved crack free TiN barrier metal in a contact hole and method of forming the same'20046,754,495'Handover method in mobile communication system'20046,727,544'Semiconductor memory including cell(s) with both charge storage layer(s) and control gate laterally surrounding island-like semiconductor layer'20046,720,208'Semiconductor device'20046,627,996'Semiconductor device having fluorine containing silicon oxide layer as dielectric for wiring pattern having anti-reflective layer and insulating layer thereon'20036,593,659'Dual damascene structure with carbon containing SiO2 dielectric layers'20036,593,231'Process of manufacturing electron microscopic sample and process of analyzing semiconductor device'20036,531,760'Semiconductor device'20036,523,521'Hot water type first idle control device'20036,479,407'Semiconductor device and process for producing the same'20026,435,113'Incineration apparatus and method which suppress generation of dioxins'20026,401,689'Electric throttle-control apparatus and motor used for the apparatus'20026,344,411'OHMIC contact plug having an improved crack free tin barrier metal in a contact hole and method of forming the same'20026,341,516'Plate reduction press apparatus and methods'20026,331,238'Method of patterning a substrate with an atomic mask'20016,326,681'Semiconductor device'20016,303,982'Semiconductor device'20016,294,467'Process for forming fine wiring'20016,287,956'Multilevel interconnecting structure in semiconductor device and method of forming the same'20016,289,008'Communication system'20016,284,661'Method and apparatus for producing a wafer'20016,281,445'Device and method for connecting two electronic components'20016,263,204'Switching center for mobile handover'20016,259,920'Handover method in mobile communication system'20016,255,732'Semiconductor device and process for producing the same'20016,245,665'Semiconductor device and method of fabricating the same'20016,225,196'High electron mobility transistor and method of fabricating the same'20016,204,552'Semiconductor device'20016,189,461'Burning apparatus and method for restricting the occurrence of dioxins'20016,179,910'Method for manufacturing silicon single crystals and wafers adapted for producing semiconductors'20016,130,154'Semiconductor device and fabrication process thereof'20006,130,114'Semiconductor device'20006,124,629'Semiconductor device including a resin sealing member which exposes the rear surface of the sealed semiconductor chip'20006,108,546'Handover method in mobile communication system'20006,100,580'Semiconductor device having all outer leads extending from one side of a resin member'20006,099,945'Atomic mask and method of patterning a substrate with the atomic mask'20006,100,115'Semiconductor device'20006,081,023'Semiconductor device'20006,072,231'Semiconductor device'20006,069,029'Semiconductor device chip on lead and lead on chip manufacturing'20006,049,534'Communication system'20006,049,091'High electron mobility transistor'20006,030,450'Method of fabricating a silicon single crystal'20006,019,106'Embossed cigarette wrapper with improved holding force'20006,018,191'Semiconductor device'20005,988,602'Variable venturi carburetor'19995,981,315'Semiconductor device'19995,972,795'Method and apparatus for producing a wafer'19995,931,676'Dental attachment'19995,927,159'Ratchet wrench'19995,914,530'Semiconductor device'19995,912,186'Method for processing semiconductor material'19995,880,926'Electronic device with mounting structure'19995,863,817'Semiconductor device'19995,821,606'Semiconductor device'19985,793,099'Semiconductor device'19985,775,002'Apparatus for drying an electrode plate for a battery'19985,732,686'Air vent apparatus for carburetor'19985,716,200'Blower apparatus having a casing and motor flange having noise reducing configuration'19985,612,569'Semiconductor device'19975,530,304'Miniature motor and fan using the same'19965,530,286'Semiconductor device'19965,498,754'Process for refining crude fluoroalkylsulfonic acid with the use of water'19965,370,836'Process of making porous fluoroplastics membrane for an air depolarized battery'19945,358,904'Semiconductor device'19945,325,004'Motor'19945,294,419'Method for removing nitrogen oxides and organic chlorine compounds from combustion waste gas'19945,260,044'Method for removing organic chlorine compounds from combustion waste gas'19935,242,763'Battery pack and its packaging method'19935,231,914'Variable displacement compressor'19935,226,374'Method of controlling combustion of fluidized-bed incinerator'19935,203,169'Axle drive apparatus'19935,186,535'Device for mounting lamp on lamp mount'19935,169,268'Method of measuring supply rate of incineration waste'19925,167,758'Method of forming polycrystalline silicon layer on semiconductor wafer'19925,105,728'Balanced variable-displacement compressor'19925,068,712'Semiconductor device'19914,970,577'Semiconductor chip module'19904,866,671'System for storing starting addresses of a buffer RAM and different fonts of a character ROM upon energization of the printer'19894,820,145'Polycrystalline silicon wafer tray'19894,774,882'Method for controlling printing impact power in impact type dot printer'19884,714,502'Soft magnetic stainless steel for cold forging'19874,705,581'Soft magnetic stainless steel'19874,599,795'Cutting tool'19864,561,486'Method for fabricating polycrystalline silicon wafer'19854,519,764'Apparatus for fabricating polycrystalline silicon wafer'1985D0276496'Wire cutter and stripper'19844,449,430'Pipe gripping tools'1984D0272122'Foot operated vice'19844,220,729'Flame-retardant isocyanate-based foams and method of producing the same'19804,133,781'Smoke-retardant polyisocyanurate foam'19794,064,289'Method of making a semiconductor device'19774,055,522'Process for producing an isocyanate-based polymer having reduced smoke generation'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–2016Patents assigned to HITACHI LTD (38)· patent assignee history
1977–2005Based in Hitachi, JP· patent location history
1979–2020Based in Tokyo, JP· patent location history
1993–2015Based in Yokohama, JP· patent location history
2000–2002Patents assigned to NEC CORP (12)· patent assignee history
2000–2020Based in Kanagawa, JP· patent location history
2003–2009Patents assigned to SHARP KK (12)· patent assignee history
2008–2015Patents assigned to YOKOYAMA TAKASHI (12)· patent assignee history
2010–2020Patents assigned to SONY CORP (22)· patent assignee history
2015–2020Based in Kumamoto, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD381977–2016
SONY CORP222010–2020
NEC CORP122000–2002
SHARP KK122003–2009
YOKOYAMA TAKASHIself122008–2015
Locations
LocationPatentsSpan
Tokyo, JP341979–2020
Hitachi, JP251977–2005
Kanagawa, JP182000–2020
Yokohama, JP131993–2015
Kumamoto, JP72015–2020