JACKSON, Associate Judge.
This appeal is from a decision of the Board of Appeals of the United States Patent Office affirming a decision of the Primary Examiner rejecting, in view of the prior art, all of the claims, 10, 11, 12 and 13, of an application, Serial No. 421,437, filed December 3, 1941, for a patent on "Combination Safety Head and Closure Valve."
The references relied on are as follows:
Smith (British), 20,873 of 1914;
Smith, 2,047...
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