McDowell Mfg. Co. v. Electric Water Sterilizer Co.
Court of Appeals for the Third Circuit
Appeal from the District Court of the United States for the Western District of Pennsylvania; W. PI. Seward Thomson, Judge. Bill by the McDowell Manufacturing Company and the Electric Water Purifying Machine Company against the Electric Water Sterilizer Company and another. From the decree, complainants appeal.
1Opinion of the Court
WOOLLEY, Circuit Judge.
This action is double in character. By their bill, the plaintiffs first charge infringement of five patents granted the McDowell Manufacturing Company as assignee of Harry B. Hartman, one of the defendants, and then assert a right to an assignment of four patents granted Hartman, all relating to methods and apparatus for the electrolytic purification of water. The validity of the patents in suit granted on the assignment of Hartman, the defendant inventor, was, of course, not attacked at the trial, but infringement was denied, the plaintiffs’ right to an assignment of…
2Cases cited2 opinions
- Hubbell v. United StatesSupreme Court of the United States · 1900
- Powell v. Leicester Mills Co.U.S. Circuit Court for the District of Eastern Pennsylvania · 1900