Today EFF, joined by Public Knowledge, the Computer & Communications Industry Association and the Apache Software Foundation, filed an amicus brief asking the U.S. Supreme Court to hear a case in which Microsoft is trying to make it easier to invalidate an issued U.S. patent. If successful, this challenge should help in the fight against bad patents by lowering the standard required to prove that the patent is invalid to the same one required to prove infringement. It should especially help the free and open source community.