MessagePhone, Inc.
4Patents
0Active
4Granted
30Portfolio score
Filing activity: Nov 7, 1986 → Sep 9, 1997
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5661517A | Interactive intelligent video information system | Electricity | 450 | Expired |
| US4766604A | Method for receiving and delivering voice messages | Electricity | 151 | Expired |
| US4825460A | Line interface unit for caller-controlled receipt and delivery of voice messages | Electricity | 54 | Expired |
| US5982858A | System for providing automatic voice messaging in a digital network environment | Electricity | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.