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whether the district court’s legal conclusion of nonobviousness was correct, based on

the presumed factual findings. Id. at 1108-09; Kinetic Concepts, Inc. v. Blue Sky Med.

Group, Inc., 554 F.3d 1010, 1020-21 (Fed. Cir. 2009). In conducting this review, we

must presume the jury resolved underlying factual disputes in i4i’s favor because the

jury made no explicit factual findings. Duro-Last, 321 F.3d at 1108. This presumption

applies to disputes about (1) the scope and content of the prior art; (2) differences

between the prior art and asserted claims; (3) the existence of motivation to modify prior

art references; and (4) the level of ordinary skill in the pertinent art. Id. at 1109; see

also Graham v. John Deere Co., 383 U.S. 1, 17 (1966); Kinetic Concepts, 554 F.3d at

1019.

Microsoft’s argument on appeal—that it would have been obvious to combine

DeRose or Rita with Kugimiya—depends heavily on (1) the scope of the prior art, and

(2) whether a person of ordinary skill would have been motivated to combine the

references’ teachings. These are questions of fact. Kinetic Concepts, 554 F.3d at

1020-21. Similarly, Microsoft’s argument that the prior art discloses all of the claim

limitations boils down to questions of fact: whether the “tree structure” in Rita and

DeRose is a “metacode map,” and whether a “pointer” is an “address of use.” See id.;

Graham, 383 U.S. at 17. The jury found all of the asserted claims not invalid, meaning

the jury must have believed that there were differences between the prior art and

asserted claims, and that a person of ordinary skill would not have been motivated to

combine the references. Cf. Kinetic Concepts, 554 F.3d at 1019-20; Duro-Last, 321

F.3d at 1108-09. Because we must view the evidence in the light most favorable to the

verdict, all of these questions must be resolved against Microsoft, and in favor of i4i.

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