An anonymous reader writes "Apple's efforts to protect its intellectual property sometimes result in lawsuits that leave even the most ardent of Apple fans scratching their heads. One such suit was Apple's March 2011 lawsuit against Amazon over the retailer's use of the phrase "app store" as used in its Amazon Appstore for Android.
Now seeing as Apple was concurrently trying to secure a trademark for "app store", it didn't come as much of a surprise when Apple tried to block Amazon from using the phrase themselves. In the process, Apple alleged that Amazon was guilty of trademark infringement and false advertising."Link to Original Source