PERRY, District Judge.
Plaintiff prosecutes this action for alleged infringement of Claims 1, 5 and 6 of a patent issued to E. J. Hardey, No. 2,456,781 on December 21, 1948. The defendant defends on the grounds of invalidity and non-infringement.
The patentee states that "it is the object of the invention to provide a heater of the foregoing type which combines the delivery of radiant heat with the delivery of heated forced draft air currents.
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