KNOCH, Circuit Judge.
Plaintiff, Kennatrack Corporation (sometimes herein called "Kennatrack"), brought this action to enjoin infringement of its United States Letters Patent No. 2,732,919, for a sliding door frame assembly, and to recover damages therefor. The Trial Court, sitting without a jury, granted judgment for defendant, and this appeal followed. Plaintiff contends that the Trial Court erred in concluding that the patent in suit was invalid and not infringed...
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