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Your search returned 33 patents.
( 379/122 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 5774530 | Telecommunications network circuit usage measurement
| February 9, 1996 |
| 5751798 | Passive information access system
| September 12, 1995 |
| 5675637 | Method for automatically obtaining and presenting data from multiple data sources
| May 16, 1995 |
| 5568541 | System and method for adding a surcharge to the cost/call for telephone solicitations
| June 21, 1994 |
| 5506893 | Telecommunication network arrangement for providing real time access to call records
| November 29, 1994 |
| 5487107 | Method and apparatus for processing telephone calls charged to credit cards
| February 14, 1994 |
| 5384768 | Tracing system for tracing transmission route in transmission network
| November 30, 1993 |
| 5381467 | Telephone call billing system
| October 30, 1992 |
| 5287403 | Method and apparatus for processing telephone calls charged to credit cards
| July 22, 1992 |
| 5210789 | Interactive telephone operator terminal
| June 28, 1991 |
| 5136690 | Dynamic graphical analysis of network data
| March 21, 1991 |
| 4922519 | Automated operator assistance calls with voice processing
| September 30, 1988 |
| 4275272 | Remote time and charge system
| November 5, 1979 |
| 4146929 | Input/output security system for data processing equipment
| March 1, 1977 |
| 4093825 | Data transmission system
| March 1, 1977 |
| 4072827 | Telephone patching apparatus
| February 3, 1977 |
| 4053949 | Telephone system and method for providing directory assistance/intercept information
| April 28, 1976 |
| 4009337 | Stored program control type electronic exchange system
| October 10, 1974 |
| 3967074 | Telephone station identification system
| June 30, 1975 |
| 3920912 | Hotel PBX electronic message billing arrangement
| July 5, 1974 |
| 3920911 | Hotel PBX electronic message billing arrangement
| July 5, 1974 |
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