CHASE, Circuit Judge.
The patent in suit was issued January 30, 1917, to the executrix of George E. Knowles. Mr. Knowles filed his application October 21, 1913, and died before it was granted. As allowed, the patent contains four claims, of which the first only is relied upon. It reads as follows:
"1. A ventilating device for buildings or the like comprising a ring portion adapted to serve as a base and provided with brackets integral with said ring and extending...
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