The Newark Public Library is a designated US Patent and Trademark Depository Library. Full text of utility patents from 1790 to the present are available. Design patents from 1908 to the present are also available. The collection also includes plant patents, the Official Gazette, the weekly announcement of new patents and trademarks, and a core collection of reference materials provided by the Patent and Trademark Depository Library Program. Librarians assist searchers with the Classification and Search Support Information System database (CASSIS) on CD-ROMs and DVD-ROMs.