Search and Statistics Sites

As the leading IP services company in the United States, the USPTO selected Cardinal to conduct their PCT searches and prepare preliminary opinions across all subject categories. Cardinal offers an experienced team of over 150 U.S.-based research professionals, more than half holding Masters, Ph.D.s, and/or J.D.s.
A search engine for filed and issued patents.
A library catalog search run by Google.
Download U.S. patents (in PDF) from the U.S. Patent and Trademark Office.
Find patent statistics, including patent application filings, patents granted, patents in force and more from the World Intellectual Property Organization website.
A resource for patent litigation statistics posted by the University of Houston Law Center, provides quarterly and annual statistics on rulings
This article from the Intellogist explores best practices and recommendations for medical device searchers.
Find links to general patent and trademark statistics from the USPTO.
TechAgreements provides Business Professionals and Lawyers with access to the actual agreements used in over 500,000 transactions covering over 30 industries.