GB870880A
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Improvements in or relating to optical objectives
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US3025701A
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Apparatus for measuring or indicating the roughnesses or undulations of a surface
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US3004471A
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Control devices for optical objectives of variable focal length
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GB899635A
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Improvements in or relating to control devices for optical objectives of variable focal length
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US2959104A
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Optical objectives
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US2959103A
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Optical objectives
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US2915942A
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Anamorphotic optical systems
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US2983188A
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Optical comparator and shutter devices therefor
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US2959102A
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Optical objectives
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GB899285A
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Improvements in or relating to apparatus for measuring or indicating the roughnesses or undulations of a surface
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GB898745A
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Improvements in or relating to optical objectives of variable focal length
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US2942539A
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Camera lens mount fittings
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US2983192A
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Optical objectives
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GB881944A
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Improvements in or relating to optical objectives
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GB881943A
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Improvements in or relating to optical objectives
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GB882498A
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Improvements in or relating to shutter devices for optical testing apparatus
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US2895379A
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Optical objectives
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GB881942A
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Improvements in or relating to optical objectives
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US2842030A
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Mounts for photographic lenses
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US2821111A
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Anamorphotic optical systems
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