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United States Patent
2,745,286
Issue Date:
May 15, 1956
Current U.S. Class:
73/712
; 73/47; 73/744; D10/83
Current International Class:
G01L 7/16 (20060101); G01L 23/02 (20060101); G01L 23/00 (20060101); G01L 7/00 (20060101)
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