To actually view the patent images you will need a plug in for your browser, Internet Explorer, Netscape, or Opera, called a Tiff viewer.
The link below is to a free TIFF viewer you can download and install this is one of the ones recommended by the patent office.
You can suggest USPTO webpages or material you would like featured on this section by Email to the [email protected]
Prior to that date, an estimated 9,957 patents had been issued.
Defensive Publications (T) and Improvement patents (AI) are not included in this table.
Jewelry patents then ceased, because the patents were no longer needed.
Vintage jewelry patents are a wonderful way to date vintage jewelry that was created prior to 1955. Patent and Trademark Office has an extensive database of patents dating back to 1790.
This process could sometimes take months, so once the patent design and specifications were submitted, companies would mark their jewelry “PAT. In some cases, a design was patented, but the jewelry may not have a patent stamp, as in this lovely 1941 Coro brooch.