Intellectual property law is simply defined as property protected by law, including ideas, original works, inventions, and discoveries, both tangible and intangible.
Brown, Christopher C. Mastering United States Government Information: Sources and Services. Santa Barbara, CA: Libraries Unlimited, 2020. See especially chapter 15, "Intellectual Property, Secrets, and Declassified Information." Available online to the University of Denver community: https://du-primo.hosted.exlibrisgroup.com/permalink/f/ngjj5b/01UODE_ALMA511094209980002766.