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US2048816A
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Apparatus for the production of lens line-screen films for color photography
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GB385431A
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Improvements in the production of lenticular-screen films for colour photography
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GB335128A
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Improvements relating to the treatment of exposed chromatesensitised colloidal photographic layers
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GB308360A
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Improvements relating to exposure apparatus for copying kinematograph films
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GB316206A
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Apparatus for reproducing sounds
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GB306027A
|
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Improvements relating to the treatment of exposed chromate-colloidal photographic layers
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GB304597A
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Improvements in or relating to photographic sensitizing processes
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