Apple has been dealt a blow by the US Patent Office, which has reaffirmed its preliminary invalidation of Apple's much publicized ërubber banding' patent (ë381), reports FOSS Patents. The latest ruling has been labeled a ëFinal Office Action' by the USPTO and was revealed in a court filing by Samsung's lawyers to Judge Lucy Koh, who is presiding over the legal battle between the two companies. Although significant, the latest ruling by the USPTO can still be appealed by Apple and the Cupertino-based company will have two months to make its case.