U.S. Patent & Trademarks Office (USPTO)
The U.S. Patents from 1790 to the most current submissions are available on the from the USPTO website in full-text.
Google provides a google interface to explore the USPTO patent database.
Offers international coverage, though not comprehensive.
                     Florida Atlantic University Libraries
 
                     777 Glades Road
 
                     Boca Raton, FL 33431
                     (561) 297-6911