Use the Library Databases below to find patent literature:
For details about how to use the above databases, refer to the corresponding search guides.
Google Patent Search: a search engine from Google that indexes patents and patent application from the United States Patent and Trademark OFfice (USPTO)
Patent Lens: a free full-text patent informatics resource containing more than 9 million patent documents from US, Europe, Australia and WIPO, their status and counterparts up to 70 countries
FreePatentsOnline (FPO): provides free access to and high-quality patent searching of patent documents from US, Japan (abstracts only), Europe and WIPO.
Most patent literature is available for free from databases of patent offices
* allow searching across multiple databases
Chinese patent documentation is now available for search and retrieval from the USPTO website via the Global Patent Search Network. It enables users to search Chinese patent documents in the English or Chinese language!