United States Patent and Trademark Office The USPTO provides downloadable forms, free online patent and trademark searching and other information. http://www.uspto.gov

European Patent Office 30 million patent documents searchable free of charge on the internet. An initiative of the European Patent Organisation. http://ep.espacenet.com

Free PDF Files of U.S. Patents Retrieve the full text and images of US patents as PDF files. http://b435-boas.stanford.edu/home/other_projects/patent/patent_PDF.html

USA Idea and Invention Institute Offers market analysis kit. Features services overview, contact and ordering information. http://www.usaidea.com/