LENROOT, Associate Judge.
This is an appeal from a decision of the Board of Appeals of the United States Patent Office, affirming the rejection by the Examiner of claims 8, 10, 13, 14, 15, and 26 of appellant's application, filed on April 19, 1924; claims 1, 2, and 3 have been allowed.
Claims 10 and 26 are illustrative of the appealed claims, and read as follows:
"10. In a plug valve device, in combination, a tapered valve seat, a tapered valve adapted...
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