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Bertus Griesen
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Hengelo (O), NL
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last 30 patents
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Patent Grant
Method for switching in a three-phase high voltage circuit
Patent number
4,628,393
Issue date
Dec 9, 1986
Hazemeijer B.V.
Bertus Griesen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
High tension vacuum switches
Patent number
4,281,231
Issue date
Jul 28, 1981
Hazemeijer B.V.
Bertus Griesen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Electrical vacuum switch having means for generating an axial magne...
Patent number
4,271,340
Issue date
Jun 2, 1981
Hazemeijer B.V.
Bertus Griesen
H01 - BASIC ELECTRIC ELEMENTS