AT&T Wireless
5Patents
0Active
5Granted
28Portfolio score
Filing activity: Oct 8, 1996 → Jun 19, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5946615A | Mobile network geographic address translation | Electricity | 75 | Expired |
| US5875398A | Method and apparatus for testing cellular services in a first location from a second location remote from the first location | Electricity | 48 | Expired |
| US5923700A | Adaptive weight update method and system for a discrete multitone spread spectrum communications system | Electricity | 45 | Expired |
| US6707894B1 | Prepaid calling time processing: a method and apparatus for processing pre-paid calling time in a telephone communication system | Electricity | 13 | Expired |
| US6826236B2 | Maximum ratio transmission | Electricity | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.