Inventor

Minoru Sakaguchi

Inventor

Hitachi, JP

Overview

1980–2002

Patent span

Electricity

Primary field (CPC H)

Patents· 15 as inventor

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

H02Bprimary

H02BBoards, substations or switching arrangements for the supply or distribution of electric power48%

H01HElectric switches26%

H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines17%

B41JTypewriters4%

G06KGraphical data reading4%

PatentTitleYear

6,491,458'Printing system'2002 6,268,562'Sealed container and method for assembling it'2001 5,670,767'Gas-insulated switchgear with improved insulation joint'1997 5,453,910'Gas insulated switchgear device'1995 5,177,664'Gas insulated switchgear'1993 5,134,542'Three-phase package-type gas-insulated switch gear having isolators being aligned in a first plane and earthing switches disposed laterally side by side on a second plane'1992 5,045,968'Gas insulated switchgear with bus-section-unit circuit breaker and disconnect switches connected to external lead-out means connectable to other gas insulated switchgear'1991 5,001,599'Gas-insulated switchgear apparatus'1991 4,967,307'Gas insulated switchgear apparatus'1990 4,888,458'Apparatus for disconnecting a switch of a high voltage electric circuit'1989 4,862,319'Gas-insulated switchgear'1989 4,651,255'Connecting system for gas-insulated switchgear apparatus'1987 4,577,075'Earthing switch for gas-insulated switchgear apparatus'1986 4,458,099'Three-phase combined type gas insulated electrical apparatus'1984 4,215,256'Gas-insulated switchgear apparatus'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–2001Patents assigned to HITACHI LTD (14)· patent assignee history

1980–2001Based in Hitachi, JP· patent location history

2002Patents assigned to JAPAN RADIO CO LTD (1)· patent assignee history

2002Based in Nagano, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	14	1980–2001
JAPAN RADIO CO LTD	1	2002

Locations

Location	Patents	Span
Hitachi, JP	14	1980–2001
Nagano, JP	1	2002