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https://www.etsy.com/market/pat_pend_jewelry
Vintage Crown Trifari Pat Pend Gold Plated Star Flower Brooch Pin Crystal Round Baguette Rhinestone, Vintage Early Trifari Jewelry, aDashofHappy. 5 out of 5 stars. (666) $29.99. Only 1 available and it's in 2 people's carts. Favorite. Add to.
https://www.myclassicjewelry.com/blog/vintage-jewelry-patents/
Sep 05, 2014 · Locating Jewelry Patents without a Patent Number. Sometimes it can be difficult to locate a particular patent in the USPTO database or on the Google Patent Search site. If your jewelry is marked “PAT. PEND.” you might think you are out of …
https://www.etsy.com/market/monet_pat_pend
Classic NAPIER Vintage Gold Tone Slit Link Necklace & Matching Bracelet Jewelry Set Women's 80s High End Costume Jewelry Pat Pend 4.774.743 JewelryBygones 5 out of 5 stars (567) $ 88.00. Add to Favorites Monet Flat Spiral Necklace Gold Tone Vintage 56 Inch Link Chain Layered Loop Accents Pat Pend 1960s Lobster Claw Clasp ...
https://www.myclassicjewelry.com/Trifari/Marks/TrifariMarks02.htm
Trifari PAT. PEND. This is one of the earliest Trifari marks you will see (there were a couple of earlier signatures, but they are quite rare). Prior to 1955 the U.S. copyright law did not extend protection to jewelry designs, so the major manufacturers, who employed talented jewelry designers, protected their investment with U.S. patents.
http://www.midcenturyjewelry.com/tag/patent-pending/
May 13, 2009 · Let’s say you have a piece of vintage costume jewelry with a patent pending stamp or a patent # on the back. There are excellent web sites that are dedicated to identifying costume jewelry which was produced when jewelry designs were patented in the US. Patenting as a practice died out in the early 1950s and the heyday of patented costume ...
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