WEBSTER, District Judge.
The plaintiffs are the joint owners of letters patent, No. 1,308,583, dated July 1, 1919, covering a method or process for excavating tunnels and especially adapted to the boring of long tunnels through rock formations. They bring this action for the recovery of damages for the alleged infringement of the patent by the defendants in excavating the Cascade tunnel for the use of the defendant railway company.
It is admitted by the defendants...
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