Us patent dating chart

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If no specification was found, then just the details of the grant recorded in the Patent Rolls were transcribed.

The transcribed text of each patent and any drawings was then printed and published as a numbered pamphlet.

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Natural language queries can be further refined by assignee, date range, classification or containing specific terms and phrases.

To get started, see the Finding patents page in this guide.

Essential information The number and year of the patent are essential to know if you wish to view a patent.

Learn more Search using common fields like inventor names, dates and date ranges, text blocks such as claims, abstract, title and specification, classifications including IPC, CPC and USPC and meta values such as claim length, number of forward citations and much more.

Natural language queries can be further refined by assignee, date range, classification or containing specific terms and phrases. Acclaim IP finds documents with similar text and presents a ranked list of resulting patents.

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