Dating us patent numbers

(**) Reissue patents were not separately numbered until 1838.

Some patent numbers, as displayed in the table, are 7 characters with the numeric portion padded with leading zeroes. Therefore, the number of patents granted during a year cannot be determined by simply subtracting the number of the first patent issued in one year from the number of the first patent issued in the next year.

In the “PATENTS” menu there is a “Patent Search” link, which displays the page shown in the image below: Patents prior to 1976, which includes vintage jewelry patents, are scanned images in PDF format stored in the Full-Page Images database.

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

You can suggest USPTO webpages or material you would like featured on this section by Email to the [email protected]

At one time, jewelry designs could not be copyrighted, so jewelry manufacturers protected their investment in their designs using patents. Once the patent was approved, companies could then stamp the patent number on the jewelry.

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The following table displays the calendar year along with the first corresponding document number issued in each year for selected patent document types (utility, design, plant, and reissue patents and statutory invention registrations) (*) The current patent numbering system began with a patent issued on July 13, 1836.The United States patent number for each year is the first patent issued that calendar year.Always remember, patent date is only when something was patented, not when it was actually made, many items were manufactured for many years after it was patented.Essential information The number and year of the patent are essential to know if you wish to view a patent.You can then contact staff who can order the relevant patent from our offsite store, using the patent number and year. Some indexes have been digitised on the Hathi Trust website.Prior to that date, an estimated 9,957 patents had been issued.

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