Patently Absurd!  
   Absurd, weird and wacky patents, mainly from the UK Patent Office, also offering links to serious patent information.
   http://www.patent.freeserve.co.uk

Intellectual Property Law Server  
   Answers to frequently asked questions about patents, copyrights, and trademarks, from the law firm of Oppedahl & Larson.
   http://www.patents.com/

Strategy Patent, LLC  
   Information on the creation and valuation of intellectual property assets, particularly patents. From Coleman Sudol LLP.
   http://www.patentassets.com/

PatentGopher  
   A free patent retrieval service that delivers patents in portable document format (PDF) via email or direct download.
   http://www.patentgopher.com

Delphion Intellectual Property Network  
   A premier site for searching, viewing, and analyzing patent collections worldwide.
   http://www.delphion.com

CrazyPatents.com  
   Examples of wacky and crazy patents that have been issued to inventors throughout the years.
   http://www.crazypatents.com

HowStuffWorks: How Patents Work  
   Easy to read illustrated narrative that provides basic information on patents, what they are, how they work and how an inventor goes about getting one.
   http://www.howstuffworks.com/patent.htm

Patents4Technologies  
   Overview of United States patent law with reference to court rulings.
   http://www.patents4technologies.com/PatentLaw.htm

Thomas  
   Information of all patent-related bills currently pending before the U.S. Congress.
   http://thomas.loc.gov/cgi-bin/query/r?c104:patent

Ius Mentis  
   Crash courses, answers to frequently asked questions, and articles on patents and other intellectual property rights, aimed at people with a background in information and communication technology.
   http://www.iusmentis.com/

Greenberg Traurig, LLP - Patent Law Net  
   Interactive resource for patent counsel and intellectual property managers.
   http://www.patentlawnet.com/

Protection of Software-related Inventions in Europe and Japan  
   Information regarding the protection of computer-related inventions, from the law firm of Ladas and Perry.
   http://www.ladas.com/Patents/Computer/Computer.EPOJP.html

CAMBIA Intellectual Property Resource  
   Organization devoted to international agriculture and health sciences. Offers patent search, biotechnology white papers, and tutorials.
   http://www.cambiaip.org/

Patent Alert  
   Providing email updates about inventions recently patented in the United States.
   http://www.patentalert.com/

Rabin & Berdo, PC  
   District of Columbia law firm, offering a downloadable brochure on mechanical and electrical patents.
   http://www.awoodpatents.com

thinkBiotech LLC  
   Information on pharmaceutical issues, including patent claims and expirations, sales figures, and generic equivalents.
   http://www.thinkpharm.com/

Patently Obvious  
   Weblog describing cases and developments in patent law.
   http://patentlaw.typepad.com/

Patent Search Information Site  
   Introductory guide to patent information and the conduct of searches.
   http://www.patent-search-information.com

Free Patents Online  
   United States patent data, along with a list of humorous patents.
   http://www.freepatentsonline.com

Freshpatents.com  
   Listing of recent US patent applications with keyword monitoring and RSS feeds.
   http://www.freshpatents.com/