System for providing a simultaneous data and voice channel within a single channel of a portable cellular telephone to provide position-enhanced cellular services (PECS)
US6226529A · kind A · utility
279Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1994 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Dec 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/6041
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An accessory device for portable telephones which provides simultaneous functionality of a hands-free accessory device and a data-in-voice modem enabling a portable telephone to be used in a vehicle such that the driver can be engaged in a hands-free conversation at the same time as data (such as GPS position information) is being sent over the same cellular voice channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.