Starting points and a link to more information on step-by-step guides to conducting patent or trademark searches using the U.S. Patent & Trademark Office (USPTO) web databases, as well as additional patent and trademark research and information resources, and links to USPTO information for trademark and patent applicants.
The Official Gazette (OG) is the official journal of the USPTO, published weekly on Tuesday, that includes bibliographic information and a representative drawing for each patent granted or trademark published on that issue date. Links to the Official Gazette for Trademarks and the Official Gazette for Patents are provided here.
1996-current available online from the GPO.
1938-current available from HeinOnline (UW Restricted).
1970-one year ago available in print at the Gallagher Law Library. The most recent print copy can be found in GovPubs reference, call number AE 2.106/3:37
You can browse in Gov Pubs U.S. Stacks for documents from the Patent and Trademark Office using the SuDoc number C 21.