Title:
Electronic telephone switching system
United States Patent 3223785


Inventors:
Budlong, Willis A.
Drew, Glen G.
Harr, John A.
Application Number:
US86281259A
Publication Date:
12/14/1965
Filing Date:
12/30/1959
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
Other Classes:
379/274, 379/279, 379/280
International Classes:
H04Q3/545
View Patent Images:
Foreign References:
GB763828A1956-12-19