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| US Patent and Trademark Office |
The US Patent and Trademark Office (PTO) offers World-Wide Web (web) access to separate bibliographic and full-text patent databases.These databases cover the period from the first US patent, issued in 1790, to the most recent weekly issue date (usually each Tuesday). Notice: To view and save the "full-patent", you can go to ftp://ftp.iut.ac.ir/software/tools/tiffviewer/ and download Tiff Plugin. |
| esp@cenet NetworkTrademark Office |
| A free service on the internet provided by the European Patent Organization through the EPO and the national offices of its members states. esp@cenet can also be used to find English-language abstracts of documents in the European Patent Office's in-house databases of patents from throughout the world. A large proportion of the data goes back to 1970. In addition, images of the paper publications are available back to 1920 for the most important countries. |
| Canadian Patent Office |
| The Canadian Patent Database lets you access over 75 years of patent descriptions and images. You can search, retrieve and study more than 1,500,000 patent document. |
| Free Patents Online |
| FreePatentsOnline.com provides fast, free patent searching, with powerful features such as PDF downloading, search management functions, collaborative document folders, and more. |
| Wiki Patents |
| The WikiPatents Community contributes to the US patent system by reviewing issued patents and pending patent applications. WikiPatents features a wiki-like interface to review, rate, and discuss patents -- plus free patent PDF downloads, file histories, and advanced patent searching |
| PAT2PDF |