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United States Patent
2,839,346
Issue Date:
June 17, 1958
Current U.S. Class:
242/560.3
; 225/34
Current CPC Class:
A47K 10/3827 (20130101); Y10T 225/232 (20150401)
Current International Class:
A47K 10/24 (20060101); A47K 10/38 (20060101)
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