ATI Technologies ULC v. Iancu, No. 16-2222 (Fed. Cir. 2019)Annotate this Case
On inter partes review of ATI’s “Unified Shader Patents,” LGE cited multiple prior references. A “shader” as used in this field is a computer-implemented system that specifies how a computer-graphics three-dimensional image is generated and presented on a two-dimensional screen. ATI argued that the invention in each of the three patents preceded the primary reference dates for that patent. In conformity with 37 C.F.R. 1.131, ATI presented evidence of conception, reduction to practice, and diligence for each patent. the Patent Trial and Appeal Board held all but one of the challenged claims unpatentable as anticipated or obvious, The Board held that ATI had not established actual reduction to practice and had not established diligence to constructive reduction to practice, for all three patents. The Federal Circuit reversed, concluding that the Board erred in its application of the law of diligence and that on the correct law, diligence was shown, thereby antedating the relevant references. The undisputed rulings established conception and constructive reduction to practice.