SPARKS, Circuit Judge.
Plaintiffs charged defendants with infringement of claims 1 and 2 of their United States Patent No. 2,152,699, issued to them April 4, 1939, on their application of October 8, 1934. The defense was non-infringement and invalidity. The court found the facts specially, and that the claims were valid but not infringed. It concluded as a matter of law that the claims were not infringed, and decreed accordingly on December 29, 1944. It made no conclusion...
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