This Patent Assignment Search database contains all recorded Patent Assignment information from August 1980 to the present.
Calendar Year Patent Statistics (Jan 1 - Dec 31) issued by the Patent Technology Monitoring Team (PTMT).
USPTO's Patent Data Visualization Center
The Innovation Information Initiative is a data collaborative for open innovation data and related analytics, tools, and metrics. This includes global patent datasets, citation graphs among and between patents and scholarship, and metric or secondary datasets derived from these.
The National Bureau of Economic Research (NBER) U.S. Patent Citations Data File According to their website, the data is now out-of-date, but contains detailed information on almost 3 million U.S. patents granted between January 1963 and December 1999. See Hall, B. H., A. B. Jaffe, and M. Trajtenberg (2001). "The NBER Patent Citation Data File: Lessons, Insights and Methodological Tools." NBER Working Paper 8498 for more information in using this dataset.
Intellectual Property Statistics Data Center from the World Intellectual Property Organization (WIPO) is a free online tool for Intellectual Property professionals, researchers, and policymakers worldwide.
