On-demand communications services
US5745553A · kind A · utility
89Cited by
17References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1996 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Apr 16, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/4228
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communications system is designed to transmit to end-user devices involved in a call information related to communications services that are invokable in real time from the end-user devices. The transmitted information includes activation codes for invoking for a usage fee, features that may or may not be subscribed to by a caller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.