Patent Law: A Practitioner’s Guide (Fourth Edition)is a valuable guide for patent specialists and other intellectual property lawyers, corporate counsel and executives, inventors, and general practitioners representing inventors looking to gain knowledge of the legal framework governing patents. This includes developments under the America Invents Act, federal regulations and court decisions, the widely accepted four-step test used by the courts to determine an invention’s patentability, the various tests used to indicate direct infringement and other patent violations and drafting techniques used to prepare the full variety of documents, including specifications and claims.

The new release includes the following updates:

• Section 1:7.1, Utility patent subject matter eligibility, discusses several Federal Circuit cases on section 101 eligibility including Weisner v. Google LLC, International Business Machines Corp. v. Zillow Group, Inc., and American Axle & Manufacturing v. Neapco Holdings.
• Section 5:3.6, Statutory bars—disclosure, explores Mylan Pharmaceuticals Inc. v. Merck Sharp & Dohme Corp., in which the Federal Circuit considered whether prior disclosure of a genus of compounds and their pharmaceutically acceptable salts was sufficient to anticipate, under 35 U.S.C. §102, a claim directed to a species of a specific salt of a specific compound having a specific stoichiometric ratio.
• Section 6:10.1, Unitary European patent, is a new section that reviews the unitary European patent and the now operative Unified Patent Court.
• Section 24:6.1, Inter partes review, covers a Federal Circuit case considering whether applicant-admitted prior art could form the basis of invalidity in an IPR, and another case clarifying the scope of IPR estoppel under 35 U.S.C. § 315(e)(2).

The Tables of Authorities and Index have also been updated.

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