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3808831
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Patent Grant
3808831
References
Source
Patent Number
3,808,831
Date Filed
Not available
Date Issued
Tuesday, May 7, 1974
51 years ago
CPC
E01C13/102 - Civil engineering aspects of the construction of ice rinks or sledge runs made from frozen-liquid, semi-liquid or frozen-pasty substances
E04H4/0025 - with inflatable parts
US Classifications
062 - Refrigeration
004 - Baths, closets, sinks, and spittoons
441 - Buoys, rafts, and aquatic devices
472 - Amusement devices
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