SPARKS, Circuit Judge.
Appellant charged appellees with infringement of United States Patent No. 2,264,141 issued to Nemeroff on November 25, 1941, on an application filed March 26, 1941. The defenses were noninfringement and invalidity. The District Court decreed that the patent was neither infringed nor valid, and from that decree this appeal is prosecuted.
The invention relates to fluorescent lighting fixtures, and more particularly to those of a type adapted...
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