HATFIELD, Associate Judge.
This is an appeal in an interference proceeding from the decision of the Board of Appeals affirming the decision of the Examiner of Interferences awarding priority of invention to appellee, Harmon E. Lindbladh.
The invention relates to a duplex ruling machine, a machine for ruling lines on paper. It consists, generally speaking, of a combination of two single ruling machines so constructed that sheets of paper are caused to pass...
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