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United States Patent
3,408,515
Issue Date:
October 29, 1968
Current U.S. Class:
310/361
; 310/366; 310/368; 333/187; 968/824
Current International Class:
H03H 9/125 (20060101); H03H 9/19 (20060101); H03H 9/00 (20060101); G04F 5/00 (20060101); G04F 5/06 (20060101)
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