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 denying all of the claims, Nos. 33 to 55, inclusive, in appellant's application for a patent for an alleged invention relating to improvements in a fuel burner.
Claims 34 and 54 are illustrative. They read:
"34. In combination, a furnace having a wall with an opening therein, means...
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