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United States Patent
3,233,450
Issue Date:
February 8, 1966
Current U.S. Class:
73/620
; 600/407; 73/629
Current CPC Class:
G01N 29/07 (20130101); G01N 29/221 (20130101)
Current International Class:
G01N 29/07 (20060101); G01N 29/22 (20060101); G01N 29/04 (20060101)
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