Does Article III's grant of jurisdiction of "all Cases . . . arising under . . . the
Laws of the United States," implemented in the "actual controversy"
requirement of the Declaratory Judgment Act, 28 U.S.C. section 2201(a), require a
patent licensee to refuse to pay royalties and commit material breach of the
license agreement before suing to declare the patent invalid, unenforceable
or not infringed?