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US3069972A
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Optical system for zoom binoculars
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US3107862A
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Automatic flash gun
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US3019701A
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Slide projector
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US3081669A
|
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Pointer for a slide projector
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US3059741A
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Clutch controlled drive means for a slide projector
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US3094038A
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Dual purpose shutter arrangement for a slide projector
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US3027666A
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Slide centering means and magazine
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US3084607A
|
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Iris type shutter
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US3000260A
|
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Zoom projection lens
|
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US3000259A
|
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Variable magnification lens system
|
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GB893204A
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Improvements in or relating to photographic objectives
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US2975674A
|
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Convertible dual conjugate lens
|
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GB897234A
|
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Mechanism for adjusting zoom lens assembly
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US3063610A
|
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Automatic threading mechanism for motion picture projector
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US2997921A
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Lens for zoom viewfinders
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FR1247357A
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Wear-compensating lapping tool for cutting and polishing optical lenses
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GB860925A
|
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An adjustable lap for the manufacture of precision lenses
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US2995061A
|
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Mechanism for adjusting zoom lens assembly
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US3076397A
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Automatic camera
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GB864761A
|
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Vacuum tube amplifying system
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