IP Law Daily, PATENT—Fed. Cir.: PTAB correctly found 3D application-navigation patent claims obvious in Apple, Google IPRs, (Sep 3, 2026)

By Mandavi Singh, LL.M.

Substantial evidence supported findings that prior art taught the disputed graphical-interface limitations, while the patent owner’s narrower claim constructions lacked support.

In a non-precedential decision, the U.S. Court of Appeals for the Federal Circuit has affirmed Patent Trial and Appeal Board’s (PTAB) decision finding all challenged claims of two patents covering three-dimensional graphical user interfaces unpatentable as obvious. Rejecting patent owner SpaceTime3D, Inc.’s proposed claim constructions, the court agreed that prior art relied on by technology companies Apple Inc. and Google LLC taught ordering application images in three-dimensional space and replacing those images with a corresponding application object in two-dimensional space (Spacetime3d, Inc. v. Apple Inc., No. 25-1083 (Fed. Cir. Aug. 31, 2026)).

Background. SpaceTime3D owns U.S. Patent Nos. 9,304,654 (the ’654 patent) and 9,696,868 (the ’868 patent), which share materially identical specifications. Both concern graphical user interfaces for navigating among multiple applications using two-dimensional and simulated three-dimensional spaces.

The patents explain that conventional graphical interfaces display application output in windows on a finite 2D desktop. As more windows are opened, they can overlap and make it increasingly difficult for users to locate and return to a particular application. The claimed technology addresses that problem by displaying images corresponding to applications in simulated 3D space and permitting users to switch between that display and corresponding application objects in 2D space. In the 3D environment, depth can represent time, creating what the patents describe as a visual history of a user’s computing sessions.

Apple and Google petitioned for inter partes review, challenging claims 1-19 of the ’654 patent and claims 1-20 of the ’868 patent under 35 U.S.C. § 103. The Board consolidated their substantially identical proceedings and ultimately found every challenged claim unpatentable as obvious.

The obviousness challenges principally combined two prior art references. Anthony disclosed a graphical interface providing a 3D view of a collection of data objects, including an embodiment that arranged objects chronologically according to creation or modification dates. Hanggie disclosed a desktop window manager using textures, lighting, and 3D transformations to render application windows. Apple proposed combining them by replacing the windows shown in Anthony’s 3D timeline with application windows of the type disclosed by Hanggie. The Board found the combination taught both claim limitations disputed on appeal.

Image ordering. SpaceTime3D first challenged the Board’s construction of a limitation requiring application images to be displayed in an order based on the last time the user performed one of three specified opening-and-interacting events.

SpaceTime3D contended that the language required separate determinations of when an application was opened and whether its corresponding object was subsequently interacted with. The Federal Circuit rejected that interpretation. The claim identified three possible events, each involving opening an application and interacting with an object, for determining the relevant ordering. SpaceTime3D’s construction instead would divide those events into six separately timed actions.

Nothing in the claim language imposed such a requirement, the court said, and SpaceTime3D identified nothing in the specification that would cause a skilled artisan to read the limitation that way. Because SpaceTime3D challenged the Board’s factual finding that Anthony disclosed the limitation only under its rejected construction, the court found no remaining basis for disturbing that finding.

Switching displays. SpaceTime3D separately challenged the Board’s treatment of the limitation requiring replacement of images within 3D space with a corresponding object in 2D space.

It first argued that the phrase “said... object” required replacement with the same previously generated object, including its application-specific data, so that a user would return to an application as it previously existed. SpaceTime3D relied on a construction adopted for a different language in a separate IPR involving another patent in the same family.

The Federal Circuit declined to import that limitation. Unlike the other patents, the claims here did not refer to a previously “rendered” object or contain language requiring an object to appear in precisely the state in which it previously existed. The court noted that SpaceTime3D had conceded at oral argument that rejection of its construction left the Board’s corresponding prior art finding intact.

SpaceTime3D also maintained that the Board failed to give separate meaning to the claimed “images” and “objects.” Although the court agreed that they were distinct claim elements, it rejected SpaceTime3D’s attempt to impose mutually exclusive functions on them. The claims expressly contemplated interaction with an image before the 3D display was replaced with the corresponding object.

Substantial evidence supported the Board’s finding that the Anthony-Hanggie combination disclosed the required distinction. Hanggie described application windows represented in a three-dimensional environment by textured optical counterparts, while the underlying two-dimensional application windows remained the corresponding objects. Thus, the prior art could provide distinct 3D images and 2D objects without adopting SpaceTime3D’s narrower construction.

Finally, SpaceTime3D argued that switching between 3D and 2D views did not satisfy the requirement to replace images within a 3D space with an application object within a 2D space. The court found this was a factual sufficiency argument rather than a genuine claim-construction dispute because the Board had adopted the parties’ agreed constructions of “3D space” and “2D space.”

The prior art and supporting expert testimony provided substantial evidence that selecting and maximizing a window displayed in the combined Anthony-Hanggie 3D environment replaced the 3D timeline with the corresponding application window displayed in 2D. The Federal Circuit accordingly affirmed the Board’s determination that all challenged claims of both patents were unpatentable as obvious.

The Case is No. 25-1083.

Judge: Stark, L.

Attorneys: Gregory S. Cordrey (Stradling Yocca Carlson & Rauth LLP) for SpaceTime3D, Inc. Jaysen Chung (Gibson Dunn & Crutcher LLP) for Apple Inc.

Companies: SpaceTime3D, Inc.; Apple Inc.

Cases: Patent FedCirNews TechnologyInternet