GARRETT, Presiding Judge.
This appeal from the decision of the Board of Appeals of the United States Patent Office, affirming that of the examiner, involves five claims (being all the claims), numbered 1 to 5, inclusive, of appellant's application for a patent relating to a mask designed for protecting the heads and faces, most especially the eyes, of arc welders.
The broadest of the claims (No. 1) reads as follows:
"1. A mask for use in connection...
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