THOMPSON, District Judge.
The bill alleges infringement of Parson patent, No. 874,986, issued December 31, 1907, for improvements in vacuum-producing apparatus. The bill was filed December 24, 1924. Service of a copy thereof, with the subpœna, was made on defendant December 29, 1924, but two days before the expiration of the patent, December 31, 1924. The bill avers practice of the invention by the plaintiff, infringement by the defendant, and the granting of...
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