VAN ORSDEL, Associate Justice.
This appeal is from the decision of the Commissioner of Patents, rejecting appellant's application for a patent for a locked bolt. The device is described in the claims as follows:
"1. The combination of a threaded stem and a threaded member adapted to screw on the same, a cupped washer having a central opening and lugs extending inwardly into such opening upon said washer and being adapted to be mounted upon the threaded stem...
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