VAN VALKENBURGH, Circuit Judge.
Appellant Austin F. Teigen is the patentee in letters patent No. 1,554,898 for a "Tobacco Pipe," issued September 22, 1925. Subsequently he assigned a one-fourth interest therein to appellant Bosshard. September 12, 1928, appellants brought suit against appellee charging infringement of this patent, praying injunction, accounting, and damages. The answer denied infringement, and charged anticipation and resulting invalidity. The District...
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