Its legal challenge hinges on its contention that 'app store' is a generic and commonplace term which cannot be trademarked.

TechRadar quotes the Microsoft filing as saying, "The undisputed evidence shows that 'app store' is a generic name for a store offering apps. The combined term 'app store' is commonly used in the trade, by the general press, by consumers, by Apple's competitors and even by Apple's founder and CEO Steve Jobs, as the generic name for online stores featuring ...