Microsoft took legal action against Motorola on Friday, alleging Motorola's smartphones running Google's Android platform violate Microsoft patents. The suit represents the latest patent battle involving Android.

Horacio Gutierrez, corporate vice president and Microsoft's deputy general counsel of intellectual property and licensing, said the patents relate to core functionalities of Motorola's Android phones, including synchronizing email, calendars and contacts, scheduling meetings and notifying applications of changes in signal strength and battery power. Microsoft is seeking unspecified monetary damages and a permanent injunction on allegedly infringing Motorola products.

Motorola said it will "vigorously defend itself" against the charges.

"We are disappointed that Microsoft prefers to compete over old patents rather than new products," a Google spokesman told the Wall Street Journal. "While we are not a party to this lawsuit, we stand behind the Android platform and the partners who have helped us to develop it."

The suit is notable as Microsoft is preparing to introduce phones running its new Windows Phone 7 platform--which will compete against Android phones. Motorola, once a strong supporter of Microsoft's previous Windows Mobile platform, has thrown its support fully into the Android camp. According to research firm Gartner, Android had 17.2 percent of the smartphone market in the second quarter, and Apple's (NASDAQ:AAPL) iOS had 14.2 percent. Windows Mobile captured 5 percent of the market, down from 9.3 percent in the second quarter of 2009.