Hugo Wehrenfennig
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US Patent 2,643,581.
E. Leitz Photographic Patents by Hugo Wehrenfennig
- 1951 JAN 18 - BAYONET UNION FOR CAMERA OBJECTIVE PARTS
- 1951 APR 17 - CAMERA WINDING KEY with Ludwig Leitz
- 1951 JUL 25 - FILM CONTAINER FOR ROLL FILM CAMERA with Ludwig Leitz
- 1953 OCT 01 - PHOTOGRAPHIC CAMERA WITH EXCHANGEABLE OBJECTIVES AND ADJUSTABLE VIEW FINDER with Ludwig Leitz
- 1955 MAR 15 - CAMERA WITH OBJECTIVE COUPLED SHUTTER RELEASE LOCK AND PICTURE BOUNDARY SELECTOR with August Brohl
