LexDanaLexDanabeta
Inventor

Isao Yokoyama

Inventor
Yokohama, JP

Overview

17→
Patents
1977–2012
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.

Y02Eprimary
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution8%
B23GThread cutting6%
B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors6%
C23FNon-mechanical removal of metallic material from surface6%
D07BRopes or cables in general6%
F04BPositive-displacement machines for liquids6%
F04DNon-positive-displacement pumps6%
H01FMagnets6%
H01JElectric discharge tubes or discharge lamps6%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h106%
PatentTitleYear
8,309,149'Packing method and corresponding covers for hydrogen-reduced water or food production'20127,831,329'Optimization method of deposition time and an optimization system of deposition time'20107,280,884'Optimization method of deposition time and an optimization system of deposition time'20076,386,954'Thread forming tap and threading method'20025,797,710'Thread forming tap'19985,456,115'Method of counterflow through a pump and method of controlling the operation of a pump in a pumping installation'19955,396,981'Flexible screw and transport apparatus comprising same'19955,295,573'Flexible screw and transport apparatus comprising same'19945,090,872'Method of controlling the operation of a pump in a pumping installation by detecting counterflow'19924,841,267'Deflection apparatus for cathode ray tube'19894,816,696'Variable-speed pumped-storage power generating system'19894,758,808'Impedance element mounted on a pc board'19884,714,908'Electromagnetic deflection-distortion corrector'19874,407,000'Combined dipole and ferrite antenna'19834,302,200'Process for extracting anthocyanin-type colors from natural products'19814,169,028'Cathodic protection'19794,039,417'Electrode assembly for use in cathodic protection'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1983Patents assigned to TDK ELECTRONICS CO LTD (3)· patent assignee history
1977–1987Based in Nikaho, JP· patent location history
1981–2012Based in Yokohama, JP· patent location history
1983–1989Based in Tokyo, JP· patent location history
1987–1989Patents assigned to TDK CORP (3)· patent assignee history
1989–1995Patents assigned to HITACHI LTD (3)· patent assignee history
1989–1995Based in Himeji, JP· patent location history
1992–1995Patents assigned to KANSAI ELECTRIC POWER CO (2)· patent assignee history
1994–1995Patents assigned to MITSUBISHI CABLE IND LTD (2)· patent assignee history
2007–2010Based in Sakata, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD31989–1995
TDK CORP31987–1989
TDK ELECTRONICS CO LTD31977–1983
KANSAI ELECTRIC POWER CO21992–1995
MITSUBISHI CABLE IND LTD21994–1995
Locations
LocationPatentsSpan
Yokohama, JP41981–2012
Himeji, JP31989–1995
Sakata, JP22007–2010
Tokyo, JP21983–1989
Nikaho, JP21977–1987