Title:
System operating on a marginal current basis
United States Patent 1823739


Inventors:
Horton, Joseph W.
Application Number:
US26619128A
Publication Date:
09/15/1931
Filing Date:
03/31/1928
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
Other Classes:
327/520, 361/166, 361/187, 375/286
International Classes:
H04L25/49
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