Machine’s snow-making method was not obvious

December 8, 2014

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12-08-14Claims 1, 2, 5, and 6 of patent No. 2,968,164, claiming a method for making snow which involves spraying water from the hub of a propeller, which water was then carried by air stream and then cooled and made into snow, were valid against claim of obviousness.

Hanson v. Alpine Valley Ski Area, Inc., 611 F.2d 156, (C.A.6 (Mich.)., 1979)