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Home page of the United States Patent and Trademark Office's main web site.Search for patents. PPUBS. Open Data Portal.
Whether youre starting your patent journey or are an experienced searcher, the following tools and learning resources will help you search for patents.
Class number searches: A search in the Classic search mode for a class number retrieves all goods and services in that class and any descriptions containing the class number. The class number must be entered in three (3) digits; quotation marks may be used around the three numbers but are not required.
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[US Patent & Trademark Office, Patent Full Text and Image Database].1976 to present [full-text] 1790 to present [entire database]. Patents from 1790 through 1975 are searchable only by Issue Date, Patent Number, and Current Classification (US, IPC, or CPC).
Search and research millions of U.S. patents for free on Justia.com.Office supplies; artists and teachers materials (Class D19). Sales and advertising equipment (Class D20).
