Rehearing and Rehearing En Banc Denied October 3, 1980.
ALVIN B. RUBIN, Circuit Judge:
The holder of a patent for a device used to cut grooves in duct board so that it can most practically be used to form ducts for central air conditioning and heating systems appeals the determination by the trial court that the patent was not infringed by a competing machine. The issues require only the application of long settled principles. Differing with the trial judge...
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