Patent · US Active

System for switching over a voice call

US7778630B2 · kind B2 · utility

6Cited by

0References

12Claims

0Family size

Assignee

TP Lab, Inc. · US

Inventors

Chi Fai Ho · Palo Alto, US
Shin Cheung Simon Chiu · Palo Alto, US

Key dates

Filing date	Dec 22, 2006
Grant date	Aug 17, 2010
Priority date	—
Expiry date	Jun 16, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04W36/14
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A system and method for switching a voice call from an Instant Messaging (IM) based voice network to a cellular voice network. A telephone adapted to switch a voice call from an Instant Messaging (IM) based voice network to a cellular voice network.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.