Site includes the full text of the Patent Cooperation Treaty. Check out Other Intellectual Property Offices for links to sites worldwide. The free Canadian Patent Database provides access to over 75 years of Canadian patent descriptions and images from more than 1,400,000 patent documents. This site provides indexing to over 30 million patent documents from European and other patent offices worldwide, including Japanese, German, and U.S. patents. The records provide basic patent information and in many cases an English abstract and image of the first page.
Some records provide full-text descriptions, claims, and drawings.
Wacky Patents Hilarious site.