Calypso sues T-Mobile over [email protected]

Calypso Wireless has filed a patent infringement claim against T-Mobile USA, claiming that the carrier violated its patent on switching between GSM networks and WiFi connections. 

Calypso says that T-Mobile [email protected] service violates the patent it holds on automatic switching of network access points. T-Mobile's [email protected] service has been in operation since June 2007, and T-Mobile has a small portfolio of phones that work with it.

"Calypso has invested significantly in the discovery, development and continued advancement of FMC," said Richard Pattin, president of Calypso. "When others make use of our patented technology, we will continue to take aggressive action including the enforcement of our legal rights."

T-Mobile released a statement regarding the claim:

"T-Mobile USA, Inc. has been made aware of the filed lawsuit and is reviewing the complaint and asserted patent. Based on its preliminary review the company believes that Calypso Wireless's allegations are without merit. T-Mobile intends to defend itself vigorously in this case."

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