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2. Google Patents - Wikipedia, the free encyclopedia

   en.wikipedia.org/wiki/Google_Patents

   Wikipedia entry for Google Patents.Google Patents is a search engine from Google that indexes patents and patent applications from the United States Patent and Trademark Office.

3. Patentscope - Wikipedia

   en.wikipedia.org/wiki/Patentscope

   Online and developing. PATENTSCOPE is a global patent database and search system developed and maintained by the World Intellectual Property Organization. It provides free and open access to a vast collection of international patent documents, including patent applications, granted patents, and related technical information.

4. Espacenet - Wikipedia

   en.wikipedia.org/wiki/Espacenet

   Espacenet. Espacenet (formerly stylized as esp@cenet) [1][2] is a free online service for searching patents and patent applications. Espacenet was developed by the European Patent Office (EPO) together with the member states of the European Patent Organisation. Most member states have an Espacenet service in their national language, and access ...

5. Patent Application Information Retrieval - Wikipedia

   en.wikipedia.org/wiki/Patent_Application...

   Patent Application Information Retrieval (PAIR) is an online service provided by the United States Patent and Trademark Office to allow users to see the prosecution histories of United States patents and patent applications and obtain copies of documents filed therein. There are two services: Public PAIR, which allows the general public to ...

6. United States Patent and Trademark Office - Wikipedia

   en.wikipedia.org/wiki/United_States_Patent_and...

   The USPTO web site provides free electronic copies of issued patents and patent applications as multiple-page TIFF (graphic) documents. The site also provides Boolean search and analysis tools. [113] The USPTO's free distribution service only distributes the patent documents as a set of TIFF files. [114]

7. Patent Cooperation Treaty - Wikipedia

   en.wikipedia.org/wiki/Patent_Cooperation_Treaty

   The Patent Cooperation Treaty (PCT) is an international patent law treaty, concluded in 1970. It provides a unified procedure for filing patent applications to protect inventions in each of its contracting states. A patent application filed under the PCT is called an international application, or PCT application.