HAMLEY, Circuit Judge.
This is a patent infringement suit between competing manufacturers and sellers of supermarket check stands. The trial court found and concluded that the patent is invalid because of the prior art and for lack of invention. Without reaching the question of infringement, therefore, the court entered judgments for the defendants. Plaintiffs appeal.
Plaintiff Spee-Dee Checkout Systems, Inc., is the owner of United States patent No. 2,599...
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