This appeal involves the validity of a patent issued upon a "food processing machine" and its alleged infringement.
George O. Graves, d/b/a Michiana Mills, inventor and owner of the patent in suit, brought this action for infringement against Kell-Dot Industries, Inc., Edwin F. Kelley, and Manley, Inc. Defendants denied liability and, by affirmative defense, pleaded invalidity of the patent...
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