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https://www.myclassicjewelry.com/blog/vintage-jewelry-patents/
Sep 05, 2014 · Vintage jewelry patents are a wonderful way to date vintage jewelry that was created prior to 1955. The documents provide illustrations (which are works of art in themselves), and filing and issue dates. Using the U.S. Patent and Trademark Site The U.S. Patent and Trademark Office has an extensive database of patents …
https://www.jewelrypatents.com/
Vintage Jewelry Patents ... Add to the Archives » Search (each addition narrows search) Text: Date: to . Pat. #: to . Resources (more info on the web) Researching Costume Jewelry (by Illusion Jewels) Jewel Chat Magazine (on Morning Glory Antiques) Eclectic Vintage (Jewelry Research & …
https://www.upcounsel.com/jewelry-patents
Nov 09, 2020 · The United States Patent and Trademark Office, or USPTO, has a large database containing patents that date all the way back to 1790. If you know the patent number, it's an excellent way to find vintage or antique jewelry patents. Click on the "Search for Patents" link under the Patents menu near the top of the page to get started.Estimated Reading Time: 9 mins
http://www.biddingtons.com/content/patentchart.html
United States Patent Dates and Numbers 1836-1990 The United States Patent Office started issuing patent numbers in 1836. An amazing variety of 19th and 20th century American antiques, jewelry and collectibles are marked with the patent number identifying the year that the object was patented. 1836: 1 - …
http://www.patent-search-information.com/jewelrypatents.html
Aug 17, 2014 · Jewelry design patents are a great source of information. Design patents are used to protect the appearance of a manufactured item. Design patents pertain to the appearance of the item and protect the way an item looks. Individual sections of the Patent Search Information Site detail how to find patents using free resources on the Web.
https://www.myclassicjewelry.com/blog/vintage-jewelry-hardware/
Sep 20, 2014 · Monet had a patented, rounded sister clasp used in its jewelry in the 1950s and 1960s. Vintage Narrow and Wide Foldover Bracelet Clasps and Monet Patented Sister Clasp In addition, there were some specialty clasps used, such as snap clasps, unique pin clasps found on wide link and bangle bracelets, and unique hook clasps.
https://www.uspto.gov/web/offices/ac/ido/oeip/taf/issudate.pdf
June 8, 1995, now have a patent term of seventeen years from the date of patent grant or twenty years from the date of filing of the earliest related patent application, whichever is longer. Utility patents are subject to the payment of periodic maintenance fees to keep the patent in force. Patent terms can be extended under some specific ...
https://www.oldstuffonly.com/patent_dates.asp
These dates are a handy reference that you may find useful for figuring out when an item was first produced. For example, if you find something with a patent number of 1,941,448 on it, you will find in the chart below that it was patented in 1933. Production of the item probably started that year.
http://www.uspto.gov/web/offices/ac/ido/oeip/taf/issuyear.htm
186 rows · A detailed Patent Technology Monitoring Team report, titled Issue Dates and Patent …
http://www.biddingtons.com/content/investingpatent.html
Even rookie investors in antiques and collectibles appreciate the importance of age in determining the value of an object. Frequently one finds that sellers guess-timate the age of a piece to show the item in its most favorable light.Weekend collectors--in a post-brunch glow and accompanied by a charming companion--are all too ready to hear the best of an object that has attracted their attention.
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