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Bio-Technology General Corp. v. Genentech, Inc. — Patent on Recombinant Human Growth Hormone Is Enabled Even Though Process Produces Predominantly Met-hGH Rather Than Mature hGH

The Federal Circuit reversed a judgment of invalidity for lack of enablement, holding that a patent on a recombinant method for producing human growth hormone (hGH) was adequately enabled even though the process predominantly produced met-hGH (containing an extra methionine residue) rather than matu

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Toro Co. v. White Consolidated Industries — Separating a Unitary Claim Structure into Two Pieces May Infringe Under Doctrine of Equivalents

The Federal Circuit vacated summary judgment and remanded for trial, holding that splitting a claimed unitary structure into two separate components may constitute infringement under the doctrine of equivalents even when the literal claim requirement for a single integrated piece is not met.

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Exxon Research & Engineering Co. v. United States — Close Questions of Claim Construction Do Not Automatically Render Claims Indefinite

The Federal Circuit reversed a summary judgment of invalidity for indefiniteness, reaffirming that claims are sufficiently definite under § 112 if a person skilled in the art would understand the bounds of the claim when read in light of the specification — close questions of claim construction do n

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Gart v. Logitech, Inc. — Preferred Embodiment’s Specific Structure Cannot Limit Broader Claim Language; Patent Notice Letters Must Identify Specific Products

The Federal Circuit vacated summary judgment of non-infringement, holding that the district court improperly imported a structural limitation (a “ledge”) from the patent drawings into a broader claim term (“angular medial surface”), and clarified when a patentee’s pre-s

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