Title:
Telegraph signal transmission system
Document Type and Number:
United States Patent 2380666
Inventors:
Montford, Morrison
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Publication Date:
07/31/1945
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Assignee:
Montford, Morrison
Primary Class:
Other Classes:
84/639, 369/118, 359/227, 250/233, 358/496, 84/601
International Classes:
H04L21/02; H04L21/00