WALKER, Circuit Judge.
The bill in this case charged infringement of letters patent No. 1,076,617, granted to one of the appellants, William M. White, October 21, 1913, for a spiral casing, the specification of the patent stating: "This invention relates to improvements in the construction of spiral casings for machinery using a fluid medium, such as hydraulic turbines, centrifugal pumps, blowers and other similar machinery." The charges of infringement were based...
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