United States Patent 1239221

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Primary Class:
264/117
Other Classes:
425/DIG.101, 23/313R, 118/303, 159/48.100, 23/293A, 425/222, 71/64.050, 23/313P, 159/4.300, 44/593, 159/25.100
International Classes:
A23G3/26; A23G3/02