The US Court of Appeals for the Federal Circuit endorsed for the first time the “all substantial rights” test to determine whether inventions are commonly owned for purposes of obviousness-type double patenting validity analysis of a later patent. Immunex Corp. v. Sandoz, Inc., Case No. 20-1037 (Fed. Cir. July 1, 2020) (O’Malley, J.) (Reyna, J., dissenting). The Court determined that patents were not commonly owned—and therefore a later patent was not invalid for obviousness-type double patenting—when the patentee retained a secondary right to sue for infringement and the right to “veto” further assignment of the patents by the grantee. Roche licensed a family of patent applications to Immunex. Under the license agreement, Immunex agreed to pay a running royalty to Roche based on sales of products incorporating the patented technology. Non-party Amgen subsequently acquired Immunex. Amgen, Immunex and Roche entered into an agreement to eliminate the continuing...

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