HATFIELD, Associate Judge.
This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the decision of the Primary Examiner rejecting claims 4 and 12 to 20, inclusive, in appellant's application for a patent for an invention relating to a duplicating machine and a method of producing duplicate copies.
The references relied upon are: Carlson 2,094,348 September 28, 1937; Gessler et al. 2,157,385 May 9, 1939; Pittman...
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