Wilhelm Schafer
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E. Leitz Photographic Patents by Wilhelm Schafer
- 1958 FEB 18 - OBJECTIVE MOUNTING IN CAMERAS
- 1961 MAR 13 - CAMERA WITH A BUILT-IN EXPOSURE METER
- 1970 AUG 31 - FILM CARTRIDGE with Heinz Keiner, Helmut Richter and Willi Goldberg
