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William E. Riskey
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Whitmore Lake, MI, US
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last 30 patents
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Patent Grant
Method and apparatus for making snow for ski slopes and the like
Patent number
4,214,700
Issue date
Jul 29, 1980
Snow Machines, Inc.
James B. Vanderkelen
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...