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E. Leitz Photographic Patents by Heinrich Broschke
- 1959 JUL 03 - PHOTOGRAPHIC CAMERA WITH BUILT-IN PHOTO-ELECTRIC LIGHT METER COUPLED WITH CAMERA ADJUSTING MEMBERS
- 1961 FEB 27 - CAMERA WITH A BUILT-IN EXPOSURE METER see above
- 1961 APR 11 - CAMERA WITH A BUILT-IN EXPOSURE METER