Double exposure and blanks preventing device for camera

Double exposure control for microfiche recording system

Double exposure prevention camera

Double exposure prevention camera

Double exposure prevention camera

Double exposure prevention device

Double exposure prevention device

Double exposure prevention device

Double exposure prevention device

Double exposure prevention device

Double exposure prevention device for photographic camera

Double exposure prevention device for roll-holding cameras

Double reflector

Double shutter heat protection for motion picture projectors

Double shutter trigger lock

Double-sided lens sheet and projection screen

Drive assembly for microfilm cartridges

Drive mechanism for rotatable flash attachment

Drive system for a reflex member

Drive system for the image section of an x-ray apparatus