Q. Patents

Go to the following websites:

• Europe's Network of Patent Databases
• FreePatentsOnline.com
• Google Patent Search. Also offers an Advanced Patent Search page, which allows one to search by patent number, title, inventor, date, etc.
• sumobrain.com
• Trademark Electronic Search System (TESS)
• U.S. Patent & Trademark Office -USPTO
• European Patent Office
• The Lens
• USPTO Glossary
• World Intellectual Property Organization (WIPO)

For some patent rankings and statistics, see:

Spain:

• Oficina española de patentes y marcas - OEPM

See also the FAQ Companies: Intellectual property and Patents