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Inventor

Masayoshi Hayakawa

Inventor
Hitachi, JP

Overview

4→
Patents
1998–2001
Patent span
Electricity
Primary field (CPC H)

Patents· 4 as inventor

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

H01Hprimary
H01HElectric switches67%
H02BBoards, substations or switching arrangements for the supply or distribution of electric power33%
PatentTitleYear
RE037244'Insulated type switching device'20016,005,213'Insulated type switchgear device'19995,952,636'Vacuum type switch gear device having L shaped stationary and movable conductors arrangement'19995,719,365'Insulated type switching device'1998

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1998–2001Patents assigned to HITACHI LTD (4)· patent assignee history
1998–2001Based in Hitachi, JP· patent location history
1999Patents assigned to TOKYO ELECTRIC POWER CO (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD41998–2001
TOKYO ELECTRIC POWER CO21999
Locations
LocationPatentsSpan
Hitachi, JP41998–2001