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Patent US1452833 - APPARATUS FOR AUTOMATICALLY FOCUSING MULTIPLE EXPOSURE CAMERAS
APPARATUS FOR AUTOMATICALLY FOCUSING MULTIPLE EXPOSURE CAMERAS
WENZEL FRITSCHE
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Patent number
: 1452833
Filing date
: Mar 11, 1920
Issue date
: Apr 24, 1923
Inventor
:
WENZEL FRITSCHE
Current U.S. Classification
:
355/56
View patent at USPTO
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