VAN VALKENBURGH, Circuit Judge.
This case involves a contest between systems employed in the dry cleaning of textile materials, such as soiled garments and the like. Appellant is the owner of three patents: The Fenton patent, No. 1,669,235, issued May 8, 1928; the Hatfield patent, No. 1,704,604, issued March 5, 1929; and the Hatfield-Alliott patent, No. 1,728,343, issued September 17, 1929. It is charged that three claims in each patent are infringed by the process...
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