Undoing a function requested by a first client station on a computer object stored on a server station of a communication network is provided. The execution of the function is adapted to manipulate the object from an earlier state to a manipulated state. The undoing is performed by receiving a request...http://www.google.de/patents/US7441015?utm_source=gb-gplus-sharePatent US7441015 - Method of undoing an operation remotely executed on a server station
