Equipment for operator served calls at an intermediate switching center
United States Patent 3341662
US Patent References:
Process of preparing a vitamin b complex concentrate
- - 2357756
Paystation customer dialling in a toll ticketing telephone system
- - 3019294
Special service toll telephone system
- - 3133153
Signalling system for use with toll ticketing equipment
- - 3218392
Process of preparing a vitamin b complex concentrate
- - 2357756
Paystation customer dialling in a toll ticketing telephone system
- - 3019294
Special service toll telephone system
- - 3133153
Signalling system for use with toll ticketing equipment
- - 3218392
Inventors:
Cerny, Louis J.
Orfeo, Cesareo
Curtis, Robert B.
Nightingale, John G.
Parkinson Jr., Frederick H.
Orfeo, Cesareo
Curtis, Robert B.
Nightingale, John G.
Parkinson Jr., Frederick H.
Publication Date:
09/12/1967
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Export Citation:
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
Other Classes:
379/224, 379/201.010, 379/123
International Classes:
H04Q3/00