| |
 |
|
Class Information
Number: 379/219
Name: Telephonic communications > Plural exchange network or interconnection
Description: Subject matter including a system having more than one exchange (e.g, switching office), or a circuit connection therebetween.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5027387 |
Reverse direction calling system |
Jun. 25, 1991 |
| 5018195 |
Fully integrated telecommunication network |
May. 21, 1991 |
| 4989233 |
Systems for capturing telephonic mass responses |
Jan. 29, 1991 |
| 4982421 |
Virtual private line service |
Jan. 1, 1991 |
| 4953203 |
High capacity information forwarding system |
Aug. 28, 1990 |
| 4943998 |
Intermeshed communication network |
Jul. 24, 1990 |
| 4757267 |
Telephone system for connecting a customer to a supplier of goods |
Jul. 12, 1988 |
| 4756018 |
Multiple access communication system having loop-check circuitry for switching intraoffice connections |
Jul. 5, 1988 |
| 4731823 |
Apparatus and method related to communicating analog signals between different local access transport areas |
Mar. 15, 1988 |
| 4611096 |
Telephone office service assist and handoff |
Sep. 9, 1986 |
| 4398065 |
Circuit arrangement for determining the zone of origin of a telephone connection |
Aug. 9, 1983 |
| 4284848 |
Switched network telephone subscriber distribution system |
Aug. 18, 1981 |
| 3965305 |
Arrangement for increasing the call handling capabilities of a crosspoint tandem system |
Jun. 22, 1976 |
|
|
|
