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ES287148A1
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Improvements in devices for electrophotographic development (Machine-translation by Google Translate, not legally binding)
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US3063336A
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Exposure meter
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US3099623A
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Process and apparatus for the separation of solid particles from developing solutions for exposed films and the like
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ES247261A2
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Improvements in magnetic discs for gramophones (Machine-translation by Google Translate, not legally binding)
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ES243959A1
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Procedure for obtaining photoconductor layers for electrophotography. (Machine-translation by Google Translate, not legally binding)
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ES236703A1
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Procedure for the preparation of photographic material sensitive to light. (Machine-translation by Google Translate, not legally binding)
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ES227816A1
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Improvements in photographic material. (Machine-translation by Google Translate, not legally binding)
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