Microsoft and Google have agreed to bury all patent infringement litigation against each other, the companies have announced, settling 18 cases in the United States and Germany.<br />In another sign of the winding down of the global smartphone wars, the companies said the deal puts an end to court fights involving a variety of technologies, including mobile phones, Wi-Fi, and patents used in Microsoft's Xbox game consoles and other Windows products.<br />One of the most bitter disputes between the rivals began in 2010 when Microsoft accused Motorola, later acquired by Mountain View, California-based Google, of breaching its obligation to offer licenses to its wireless and video patents used in Xbox systems at a reasonable cost.