Title:
Lockout circuit
United States Patent 2794121


Inventors:
Bjornson, Bjorn G.
Application Number:
US28926852A
Publication Date:
05/28/1957
Filing Date:
05/22/1952
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
Other Classes:
327/595, 327/598, 379/258
International Classes:
H04Q3/00
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