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US1751882A
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Photographic card and method of producing the same
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Photographic developing process and temperature regulation
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ES103872A1
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Improvements in or related to photographic devices.
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Photographic machine for taking a negative and making a positive therefrom
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Improved method of and apparatus for developing exposed photographic surfaces
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Process for making colored photographs
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Automatic photographing machine
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Process for making coloured photographs
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CA278917A
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Sensitized photographic card
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CA288428A
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Photographing machine
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CA297586A
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Photographic developing process and temperature regulation
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