Writ of Certiorari Denied May 26, 1941. See 61 S.Ct. 1096, 85 L.Ed. ___.
SWAN, Circuit Judge.
This is an appeal in a patent infringement suit in which the usual defenses of invalidity and noninfringement were set up by the defendant. Both issues were determined in the plaintiff's favor by the trial court and both are disputed by the appellant here.
The patent in suit is for an improvement in mail chutes of the type commonly used in office buildings...
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