Microsoft is being sued over the "Live Tiles" it uses in its phones and Windows 8 RT.
SurfCast, in a complaint filed yesterday in a U.S. District Court in Maine, said Microsoft infringes one of its four patents -- No. 6,724,403 -- by "making, using, selling, and offering to sell devices and software products" covered by SurfCast's patent. That includes mobile devices using the Windows Phone 7 and Windows Phone 8 operating systems as well as PCs using Windows 8/RT. The company also said Microsoft is contributing to infringement by encouraging developers to make app tiles for the Windows Store.