PER CURIAM.
This is a suit under R.S. § 4915, 35 U.S.C. A. § 63, to obtain a patent on a mattress. Appellant's application discloses, in the opposite sides of an inner-spring mattress ventilated by grommets, padding of different heat-conducting characteristics. The more efficient conductor is to be placed next the sleeper in summer, and the less efficient in winter. The prior Nelson mattress, patent No. 341,387, also used two different materials, and Nelson...
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