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This revised and thoroughly updated Sixth Edition covers significant legislative and judicial developments through August 2022. The authors include new material without overburdening the student or instructor with longer readings by streamlining certain case excerpts, being more selective in some instances, and making judicious use of notes in other areas. Organization follows the earlier pattern of introduction, trademark, right of publicity, trade secret, idea protection, patent, copyright law, and preemption. A combination of central coverage, optional extensions, and cross-references to related material and concepts throughout the book provides instructors the flexibility to use the book in connection with a variety of courses.