Title:
Communication system
United States Patent 2398755

Inventors:
O'd, Shepherd Judson
Publication Date:
04/16/1946
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Assignee:
O'd, Shepherd Judson
Primary Class:
379/100.010
Other Classes:
178/66.100, 178/31, 379/443, 379/108.020, 375/272, 178/17R
International Classes:
H04L27/26