Method and apparatus for authorizing use of cellular telephone units
US6654600B1 · kind B1 · utility
26Cited by
12References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2000 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jul 25, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2215/32
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A computer implemented service transmits authorization codes for cellular service by way of a network connection with a user system. The user can purchase additional activation time for an already active pre-paid service. The user can also convert a previously purchased coded card to an authorization code by interacting with the service.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.