HICKENLOOPER, Circuit Judge.
Appellant brought action in the District Court for the infringement of patent No. 1,537,879, issued May 12, 1925, upon application of Alden L. Putnam, for a pneumatic-treaded vehicle wheel. Claims 1 and 2 are in issue, and are quoted in the margin.
The validity of this patent is challenged upon many grounds, the most...
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