So Facebook has been a bit aggressive with their trademarks in the past, most recently filing to trademark the word "Face." The social network has also gone after companies that have "book" in their name. But the tables may have turned on Facebook, if long-distance calling company Talkbook has its way. As All Facebook reported last week, Talkbook filed a ?petition for cancellation? to the USPTO claiming that the social network's trademark on ?The Facebook,? was fraudulent because it dropped the "the" from the trademark. You can read all the gory details in the filing here (courtesy of DomainNameWire). And according to the USPTO, the current status of Facebook's trademark for "Facebook," now states that "a cancellation proceeding is pending at the Trademark Trial and Appeal Board." 
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