NEW YORK (CNNMoney.com) -- Facebook, which has gone after sites with the word "book" in their names, is also trying to trademark the word "face," according to court documents.
But the social networking site has met with a familiar foe. As TechCrunch first reported
, Aaron Greenspan has asked for an extension of time to file an opposition to Facebook's attempt. Greenspan is the president and CEO of Think Computer, the developer of a mobile payments app called FaceCash