JONES, District Judge.
This is a suit in equity for infringement of plaintiff's design patent No. 55,600, issued July 6, 1921.
The defendant tenders three defenses: First, that the patent is void for lack of invention because anticipated by prior invention and art; second, if the patent is an advance over prior art, it is limited to the exact details disclosed therein; third, non-infringement.
There is another reason for challenging validity, which...
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