Microsoft today filed a patent infringement action against Motorola for infringement of nine Microsoft patents by Motorola’s Android-based smartphones.

The patents at issue relate to a range of functionality embodied in Motorola’s Android smartphone devices that are “essentiall” to the smartphone user experience, including synchronizing email, calendars and contacts, scheduling meetings, and notifying applications of changes in signal strength and battery power.

”We have a responsibility to our customers, partners, and shareholders to safeguard the billions of dollars we invest each year in bringing innovative software products and services to market. Motorola needs to stop its infringement of our patented inventions in its Android smartphones," said Horacio Gutierrez, Motorola’s corporate vice president and deputy general counsel of Intellectual Property and Licensing.

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