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Inventor

Tetsuo Ishikawa

Inventor
Hitachi, JP

Overview

15→
Patents
1978–2021
Patent span
General tagging of new technological developments
Primary field (CPC Y)

Patents· 15 as inventor

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

Y10Tprimary
Y10TTechnical subjects covered by former us classification14%
B41JTypewriters7%
B41MPrinting, duplicating, marking, or copying processes7%
C23CCoating metallic material7%
G03GElectrography7%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
B08BCleaning in general3%
B22CFoundry moulding3%
B22DCasting of metals3%
PatentTitleYear
11,011,773Devices and methods for reducing battery defects202110,974,527Inkjet printing apparatus20217,584,914'Drainage pipe washing apparatus'20096,739,378'Internal chill casting method for manufacturing a cast product containing a pipe therein'20046,690,548'Ramp for use in information recording disk apparatus, and information recording disk apparatus'20046,560,435'Electrophotographic image forming device having projections on a surface of an intermediate transfer body'20035,497,495'Computer electronic system having a cover for every module'19965,243,453'Anti-moisture structures for use with a liquid crystal display'19935,182,574'Thermal head'19934,933,723'Resin coated transfer guide for electrophotographic apparatus'19904,387,311'Uninflammable dynamoelectric machine having coil windings and core encapsulated with unsaturated polyester resin-filler composition'19834,343,659'Process for producing copper barrier type, nuclear fuel cladding'19824,309,959'Apparatus for applying chemical plating to inner surfaces of tubular members'19824,257,935'Color developing sheet for pressure-sensitive recording systems'19814,125,675'Color developing sheet with organic developer and latex binder'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1981Patents assigned to SUMITOMO NAUGATUCK (2)· patent assignee history
1978–1981Based in Ibaraki, JP· patent location history
1982–2003Patents assigned to HITACHI LTD (6)· patent assignee history
1982–2003Based in Hitachi, JP· patent location history
1993Patents assigned to ALPS ELECTRIC CO LTD (1)· patent assignee history
2009Based in Tokyo, JP· patent location history
2021Patents assigned to APPLE INC (1)· patent assignee history
2021Patents assigned to CANON KK (1)· patent assignee history
2021Based in San Jose, CA, US· patent location history
2021Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD61982–2003
SUMITOMO NAUGATUCK21978–1981
ALPS ELECTRIC CO LTD11993
APPLE INC12021
CANON KK12021
Locations
LocationPatentsSpan
Hitachi, JP61982–2003
Ibaraki, JP21978–1981
San Jose, California, US12021
Yokohama, JP12021
Tokyo, JP12009