USPTO Web Patent Databases Full-text database offering access to all US patents issued since 1790 in the form of searchable patent numbers and current US classifications hyperlinked to full-page images of each page of each patent.
Google Patents Search and read the full text of patent grants and applications from around the world. Read more here.
Espacenet Includes patents issued by the European Patent Office, WIPO and a number of countries.
For more information about finding and using patents at MSU:
Patents and Patent Information at the Michigan State University Libraries
