GRAHAM, Presiding Judge.
An application was filed in the United States Patent Office by the appellant asking for a patent upon a product described as "a certain new and useful spline coupling." Claims 4, 13, 14, and 15 were rejected by both tribunals in the Office, and are brought here on appeal. Claim 13 is thought to be representative, and is as follows: "13. A spline coupling comprising a cylindrical shaft section having on one end a plurality of integral parallel...
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