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US1858651A
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Apparatus for displacing the counter pressure roller on the missing of alpha sheet in multiple reproduction apparatus
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US1709812A
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Printing press
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US1549860A
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Process of making reproductions
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GB184812A
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Improved process for preparing printing surfaces for copying documents, drawings and the like
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US1549859A
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Process for the manufacture of reproductions
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GB191305018A
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Improvements in the Manifolding of Documents, Drawings and the like.
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US1067652A
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Method of producing printing-surfaces.
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GB191117772A
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Improved Method of Copying Documents, Drawings and the like.
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US835105A
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Process for producing hectograms.
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