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Inventor

Masato Hamamoto

Inventor
Iruma, JP

Overview

17→
Patents
1989–2009
Patent span
Electricity
Primary field (CPC H)

Patents· 17 as inventor

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

H03Kprimary
H03KPulse technique26%
H10DInorganic electric semiconductor devices26%
G01RMeasuring electric variables15%
H10BElectronic memory devices15%
G06FElectric digital data processing4%
G11CStatic stores4%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h104%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h104%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
PatentTitleYear
7,576,406'Semiconductor device'20096,937,068'Semiconductor integrated circuit'20056,922,803'Test method of semiconductor intergrated circuit and test pattern generator'20056,670,201'Manufacturing method of semiconductor device'20036,636,075'Semiconductor integrated circuit and its fabrication method'20036,359,472'Semiconductor integrated circuit and its fabrication method'20026,194,915'Semiconductor integrated circuit device and process for manufacturing the same'20015,298,802'Semiconductor integrated circuit device with a plurality of logic circuits having active pull-down functions'19945,283,480'Semiconductor integrated circuit device with a plurality of logic circuits having active pull-down functions'19945,140,184'Clock feeding circuit and clock wiring system'19925,059,819'Integrated logic circuit'19915,055,710'Integrated logic circuit having plural input cells and flip-flop and output cells arranged in a cell block'19915,043,297'Wiring method of on-chip modification for an LSI'19914,999,520'High speed TTL buffer circuit which is resistive to the influence of alpha-rays'19914,940,905'ECL flip-flop with improved x-ray resistant properties'19904,891,531'ECL flip-flop with improved .alpha.-ray resistant properties'19904,868,420'Flip-flop circuit'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–2009Patents assigned to HITACHI LTD (16)· patent assignee history
1989–1991Based in Ome, JP· patent location history
1990–1994Based in Ohme, JP· patent location history
1991Based in Tokyo, JP· patent location history
2001–2009Based in Iruma, JP· patent location history
2005Patents assigned to HITACHI INFORMATION TECHNOLOGY (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD161989–2009
HITACHI INFORMATION TECHNOLOGY12005
Locations
LocationPatentsSpan
Iruma, JP72001–2009
Ohme, JP61990–1994
Tokyo, JP21991
Ome, JP21989–1991