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 all of the claims — Nos. 2, 4, 7, 8, and 9 — in appellant's application for a patent for an alleged invention relating to improvements in piston rings.
As set forth in the appealed claims, appellant's piston rings comprise a plurality of superimposed annular leaves or...
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