Microsoft on Tuesday announced plans to sell 1,500 mobile technology patents to China-based Xiaomi, in a deal that will expand both companies' access to new markets. Microsoft's office apps will gain a stronger foothold in China, while Xiaomi's smartphones will gain a stronger global presence. The agreement calls for Xiaomi to ship Microsoft Office and Skype on its Android smartphones and tablets, which are among the leading brands in China and India, as well as in other global markets.