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Inventor

Takashi Akioka

Inventor
Hitachi, JP

Overview

38→
Patents
1990–2011
Patent span
Physics
Primary field (CPC G)

Patents· 38 as inventor

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

G11Cprimary
G11CStatic stores41%
H03KPulse technique19%
G06FElectric digital data processing8%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h108%
G09GArrangements or circuits for control of indicating devices using static means to present variable information6%
H10BElectronic memory devices6%
H10DInorganic electric semiconductor devices5%
G05FSystems for regulating electric or magnetic variables3%
H03FAmplifiers3%
PatentTitleYear
7,982,314'Semiconductor integrated circuit device'20117,928,952'Image display device'20117,808,107'Semiconductor integrated circuit device'20107,547,971'Semiconductor integrated circuit device'20097,423,623'Image display device'20087,254,068'Semiconductor memory device'20077,068,551'Semiconductor memory device'20066,963,136'Semiconductor integrated circuit device'20056,856,559'Semiconductor memory device'20056,770,941'Semiconductor device and method of manufacturing a semiconductor device'20046,625,070'Semiconductor memory device'20036,538,933'High speed semiconductor memory device with short word line switching time'20036,366,507'High speed semiconductor memory device with short word line switching time'20026,329,973'Image display device'20016,032,229'Semiconductor memory device and information processor using the same'20005,920,510'Semiconductor device capable of holding signals independent of the pulse width of an external clock and a computer system including the semiconductor device'19995,787,043'Semiconductor memory device having a redundancy capability'19985,761,150'Synchronous memory with pipelined write operation'19985,742,551'Memory circuit improved in electrical characteristics'19985,680,066'Signal transition detector circuit'19975,675,548'Semiconductor integrated circuit having logi gates'19975,661,693'Memory device for synchronously reading and writing data'19975,654,931'High-speed semiconductor memory device and data processing system using the same'19975,646,897'Logic gate circuit and parallel bit test circuit for semiconductor memory devices, capable of operation at low power source levels'19975,638,335'Semiconductor device'19975,631,600'Reference current generating circuit for generating a constant current'19975,619,151'Semiconductor device'19975,563,502'Constant voltage generation circuit'19965,544,125'Semiconductor integrated circuit having logic gates'19965,523,713'Multiplex circuit arrangement for use with a semiconductor integrated circuit'19965,502,820'Microprocessor having high speed, low noise output buffers'19965,398,318'High speed, low noise output buffer with non-identical pairs of output transistors'19955,392,246'Semiconductor memory with multiple sets & redundant cells'19955,387,827'Semiconductor integrated circuit having logic gates'19955,373,469'Differential amplifier with a latching function and a memory apparatus employing same'19945,247,198'Semiconductor integrated circuit device with multiplayered wiring'19935,091,883'Semiconductor memory and microprocessor'19924,948,994'Semiconductor circuit for driving the base of a bipolar transistor'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2008Patents assigned to HITACHI LTD (29)· patent assignee history
1990–1998Based in Hitachi, JP· patent location history
1997–2011Based in Akishima, JP· patent location history
2003–2011Patents assigned to HITACHI ULSI SYS CO LTD (8)· patent assignee history
2004–2009Patents assigned to RENESAS TECH CORP (3)· patent assignee history
2005–2011Based in Kokubunji, JP· patent location history
2010–2011Patents assigned to RENESAS ELECTRONICS CORP (2)· patent assignee history
2011Patents assigned to HITACHI DISPLAYS LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD291990–2008
HITACHI ULSI SYS CO LTD82003–2011
RENESAS TECH CORP32004–2009
RENESAS ELECTRONICS CORP22010–2011
HITACHI DISPLAYS LTD12011
Locations
LocationPatentsSpan
Hitachi, JP181990–1998
Akishima, JP161997–2011
Kokubunji, JP42005–2011