- Google Patents
Fastest place to go for all US patents and some US patent applications. Contains PDFs of patents.
- European Patent Office - esp@cenet
Esp@cenet contains European patents and patent applications. Also contains many WO patents. Downloadable and printable in PDF.
Requires registration to access PDFs of patents. Allows for RSS feeds and PDF and XML data downloads.
- Japan Patent Office (JPO)
Access to japanese patent abstracts.
- Patent Lens
Contains US patents from 1976+, European, World, and Australian patents. Contains patent applications from U.S., World, and Australia. Searches full-text, downloadable into RIS format.
- United States Patent and Trademark Office
Access to all U.S. patents and U.S. patent applications. However, full text viewing requires a TIFF viewer, which requires an extra step. Recommend other databases on this page first.
- United States Patent Statitistics
Patent statistical reports based on organization, geographical location, technology, and inventor.
- World Intellectual Patent Office
Under PatentScope, contains 1 million world patents and patent applications; will have a WO prefix. When viewing patent, click on "Document" to download in PDF, ZIP, or XML.