Title:
AUTOMATIC SWITCHING SYSTEM COMPRISING DIRECT AND MUTUAL-AID ROUTES BETWEEN SELECTION UNITS
United States Patent 3454723
Inventors:
Lucas, Pierre M.
Duquesne, Jean F.
Gall, Pierre LE.
Rouzier, Michel M.
Publication Date:
07/08/1969
Export Citation:
Click for automatic bibliography generation
Assignee:
Lucas, Pierre M.
Jean, Duquesne F.
Pierre, Gall LE.
Michel, Rouzier M.
Primary Class:
379/271
Other Classes:
379/272, 379/275
International Classes:
H04Q3/545; H04Q3/545; (IPC1-7): H04M3/00
View Patent Images:
Download PDF 3454723        PDF help
US Patent References:
3272924Automatic telecommunication switching systems
3211836Automatic telecommunication switching systems
2227488Telephone system




<- Previous Patent (RESTORING SYNCHRONIZ...)   |   Next Patent (KEY CONTROLLED DIREC...) ->