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Rolf Bertram
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Oldenburg, DE
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last 30 patents
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Patent Grant
Switch contact with a weight-reduced contact spring
Patent number
9,589,740
Issue date
Mar 7, 2017
JOHNSON ELECTRIC OLDENBURG GMBH & CO. KG
Rolf Bertram
H01 - BASIC ELECTRIC ELEMENTS
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Patent Grant
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Patent number
8,053,693
Issue date
Nov 8, 2011
Saia-Burgess Oldenburg GmbH & Co., KG
Rolf Bertram
H01 - BASIC ELECTRIC ELEMENTS
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last 30 patents
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Patent Application
SWITCH CONTACT WITH A WEIGHT-REDUCED CONTACT SPRING
Publication number
20110297520
Publication date
Dec 8, 2011
Rolf Bertram
H01 - BASIC ELECTRIC ELEMENTS
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Patent Application
SWITCH CONTACT WITH A WEIGHT-REDUCED CONTACT SPRING
Publication number
20110083947
Publication date
Apr 14, 2011
Rolf Bertram
H01 - BASIC ELECTRIC ELEMENTS
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Patent Application
Switch contact with a weight-reduced contact spring
Publication number
20080156625
Publication date
Jul 3, 2008
Rolf Bertram
H01 - BASIC ELECTRIC ELEMENTS