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GB718826A
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Improvements relating to optical projectors
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GB681262A
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Improvements relating to film carriers for optical projectors
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GB682071A
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Improvements relating to photographic enlargers
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GB684956A
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Improvements relating to rangefinders
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GB668182A
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Improvements relating to exposure meters
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GB612757A
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Improvements relating to optical objectives
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GB606770A
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Improvements relating to optical rangefinders
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GB598483A
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Improvements relating to transporter mechanism for photographic film
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GB598478A
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Improvements relating to optical projectors
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GB588932A
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Improvements relating to transporter mechanism for photographic film
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GB577125A
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Improvements relating to boards for holding sensitised photographic material for projection printing and enlarging
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GB578393A
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Improvements relating to photographic enlargers
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GB571645A
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Improvements in or relating to devices for adjusting the field of view in optical apparatus
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CA438798A
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Optical apparatus
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