USPTO Web Patent database - from the U.S. Patent & Trademark Office. Searchable. Includes full-text from 1976; page images from 1790 (plug-in required).
Patent Alert (USPTO) - to set up email alerts for subjects
Electronic Orange Book - approved drug products by the FDA, with links to the original patents
Chemical Patents Plus - A service of Chemical Abstracts, Inc. Login Required - using STN-Easy user account and password. (SUNY Potsdam only - ask at the Reference Desk in Crumb Library)
Delphion Patent Server - free (registration required) searching of patent bibliographic information
