... payments beyond the life of the patent is analogous to an effort to enlarge the monopoly of the patent by tying the sale or use of the patented article to the purchase or use of unpatented ones.”... reason of his having conditioned the license of any rights to the patent or the sale of the patented product on the acquisition of a license to rights in another patent or purchase of a separate... just the right to prevent others from copying their ideas, but the power to control the use of their idea—even by those who independently develop a technology with no knowledge of the patent or the