Karl Helber

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Calmbach, Black Forest, DT

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Patents Grantslast 30 patents

Information Patent Grant
Camera shutter having an electronic timing device
- Patent number 4,057,812
- Issue date Nov 8, 1977
- Prontor-Werk Alfred Gauthier GmbH
- Waldemar T. Rentschler
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY