A Texas-based firm is suing the micro-blogging site Twitter, alleging that its three patents for a similar service are being infringed.

TechRadium’s system, called Iris, provides notification technology so that alerts can be sent to many users.

Alerts can be sent to a number of devices, including mobiles.

The firm claims several organisations may choose to use the free Twitter service instead of paying for Iris, resulting in lost revenue.

BBC NEWS | Technology | US firm sues Twitter over patents

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Former Freehand Freelance Graphic Illustrator... been online since 2004 ( late starter ), blogging since 2005, presently writing a suspense-thriller e-book that began as a screenplay.

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