MARTIN, Judge.
This appeal is from a decision of the Board of Appeals affirming the rejection of claims 1-6 and 8-10, the only claims remaining in application serial No. 87,979, filed February 8, 1961 for "Tube Coupling." The issue is obviousness under 35 U.S.C. § 103.
The invention relates to an improvement in tube couplings of the "Ermeto" type. By reference to appellant's Figures 2-4, the conventional "Ermeto"
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