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Inventor

Yoichi Yokoyama

Inventor
Kadoma, JP

Overview

10→
Patents
1986–1996
Patent span
Electricity
Primary field (CPC H)

Patents· 10 as inventor

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

H01Hprimary
H01HElectric switches69%
F16FSprings8%
G06FElectric digital data processing8%
H01FMagnets8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
PatentTitleYear
5,553,278'Method and system for manipulation of database and issuing report thereof'19965,420,555'Plural sealed contact units with common electromagnetic operating mechanism'19955,389,905'Damper, electromagnet assembly employing the damper, and relay employing the electromagnet assemblies'19955,359,305'Electromagnetic relay'19945,049,845'Welding free relay contact device'1991RE033325'Remotely controllable circuit breaker'19904,855,701'Polarized electromagnet'19894,752,660'Current limiting circuit breaker with an arc shearing plate'19884,703,294'Remotely controllable relay'19874,604,596'Remotely controllable circuit breaker'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1995Patents assigned to MATSUSHITA ELECTRIC WORKS LTD (7)· patent assignee history
1986–1990Based in Itami, JP· patent location history
1987–1995Based in Kadoma, JP· patent location history
1989Patents assigned to ELECTRIC POWER RES INST (1)· patent assignee history
1989Based in Amagasaki, JP· patent location history
1996Patents assigned to HITACHI LTD (1)· patent assignee history
1996Patents assigned to HITACHI SOFTWARE ENG (1)· patent assignee history
1996Based in Ebina, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MATSUSHITA ELECTRIC WORKS LTD71986–1995
ELECTRIC POWER RES INST11989
HITACHI LTD11996
HITACHI SOFTWARE ENG11996
Locations
LocationPatentsSpan
Kadoma, JP61987–1995
Itami, JP21986–1990
Ebina, JP11996
Amagasaki, JP11989