Title:
Location and identification of faults in signaling transmission systems
Document Type and Number:
United States Patent 2260160
Inventors:
Publication Date:
10/21/1941
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Referenced by:
Export Citation:
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
Other Classes:
340/425.100, 340/635, 340/537
International Classes:
H03F1/54; H04J1/16; H03F1/52; H04J1/00