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US1149738A
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Bath for producing etching-resists and process of preparing such bath.
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GB191111026A
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Improvements in Processes for Engraving Metals.
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GB191024375A
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A Process of Filling or Stopping Engravings in Printing Rollers.
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US797668A
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Process of engraving and etching metal.
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GB190321287A
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An Improved Process for Engraving and Etching Metal.
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GB190003976A
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Improvements in the Manufacture of Zinc Cylinders for use in Printing Textile Fabrics, also applicable for Goffering and other like Purposes
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