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CA149259A
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Method of setting step and repeat photographic machines
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GB191405827A
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Improvements in or relating to Photographic Apparatus and Processes for Producing Designs on Printing Surfaces.
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GB191306943A
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Improvements in or relating to Photographic Processes for Producing Designs on Printing Surfaces.
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GB191206115A
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Improvements in or relating to Etching Processes.
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|
GB191205696A
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Improvements in or relating to a Process and Apparatus for Detecting Forgeries of Prints or Engravings.
|
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GB191205695A
|
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Improvements in or relating to the Photographic Reproduction of Designs.
|
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GB191200699A
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Improvements in and relating to Photographic Reproduction Apparatus.
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GB191200532A
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Improvements in or relating to Feed Mechanism for Machines.
|
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GB191127264A
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Improvements in or relating to Multiple Photographic Printing-frames.
|
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GB191124487A
|
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Improved Method for Multiple Photographic Printing in Register on Sensitised Surfaces.
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CA40750A
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Electrical meter
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