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last 30 patents
Information
Patent Grant
Cryogenic refrigeration system and refrigeration method therefor
Patent number
5,443,548
Issue date
Aug 22, 1995
Hitachi, Ltd.
Norihide Saho
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information
Patent Grant
Vacuum vessel having a cooled member
Patent number
5,426,949
Issue date
Jun 27, 1995
Hitachi, Ltd.
Norihide Saho
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information
Patent Grant
Cryopump
Patent number
5,083,445
Issue date
Jan 28, 1992
Hitachi, Ltd.
Norihide Saho
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Electrical apparatus winding
Patent number
4,431,980
Issue date
Feb 14, 1984
Hitachi, Ltd.
Masahiro Ikegawa
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Winding structure for static electrical induction apparatus
Patent number
4,363,013
Issue date
Dec 7, 1982
Hitachi, Ltd.
Takahiro Daikoku
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Winding structure for static electrical induction apparatus
Patent number
4,363,012
Issue date
Dec 7, 1982
Hitachi, Ltd.
Takahiro Daikoku
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Winding structure for static electrical induction apparatus
Patent number
4,245,206
Issue date
Jan 13, 1981
Hitachi, Ltd.
Takahiro Daikoku
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Winding structure of electric devices
Patent number
4,207,550
Issue date
Jun 10, 1980
Hitachi, Ltd.
Takahiro Daikoku
H01 - BASIC ELECTRIC ELEMENTS