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 claims 1 to 5, inclusive, and 9 and 10, in appellant's application for a patent for an alleged invention relating to improvements in electric switches.
Claims 1, 3, and 9 are illustrative. They read:
"1. In a gas proof electric switch, a glass tube mercury switch, a plurality...
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