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 claim 10 in appellants' reissue application No. 454,832, filed August 13, 1942, for the reissue of their patent No. 2,229,921, issued January 28, 1941.
The claim, which was copied from a patent to J. R. Fanselow (No. 2,257,373, issued September 30, 1941) for interference purposes...
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