title: Patent-to-patent versus patent family-to-patent family citations and the impact of an invention.
authors.affiliation: Thomson Reuters, Intellectual Property & Science, Intellectual Property Solutions, Suite 400, 1925 Ballenger Avenue, Alexandria, VA 22314, USA.
authors.forename: Donald
authors.initials: D
authors.lastname: Walter
mesh_terms: D001319:Authorship; D062069:Inventions / Q000331:legislation & jurisprudence; D010330:Patents as Topic; D014481:United States
keywords: citation frequency; family citations; important patents; patent citations