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Filmstrip advancing mechanism
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Converter for a flashlight device
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Handle assembly for picture projection screen
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Plastic reinforcing edging for picture-receiving screen
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Power pack for photographic flashlamp
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Power control circuit for low voltage lamps
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Filmstrip takeup
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Electrochromic shutter system
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Film feed mechanism for motion picture projector
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Projector for selectively showing slides or film strips
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Coupling for shutter release cable for cameras
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Film-winding and indicating control
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Teaching machine
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Photographic roll film holder
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Roll film holders
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Photographic camera
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Focusing mechanism for photographic cameras
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