Use the Library Databases below to find patent literature:
Google Patent Search: a search engine from Google that indexes patents and patent application from the United States Patent and Trademark OFfice (USPTO)
The Lens: The Lens serves global patent and scholarly knowledge as a public resource to make science- and technology-enabled problem solving more effective, efficient and inclusive.
FreePatentsOnline (FPO): provides free access to and high-quality patent searching of patent documents from US, Japan (abstracts only), Europe and WIPO.
Search for patents (The United States Patent and Trademark Office): provides information about searching for patents.
Global Dossier: a single portal, developed by the IP5 Offices (USPTO, EPO, JPO, KIPO, and SIPO), for modernizing the global patent system.
Most patent literature is available for free from databases of patent offices
* allow searching across multiple databases