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https://www.myclassicjewelry.com/blog/vintage-jewelry-patents/
Sep 05, 2014 · This process could sometimes take months, so once the patent design and specifications were submitted, companies would mark their jewelry “PAT. PEND.” or “DESIGN PAT. PEND.” (sometimes “DES. PAT. PEND.”) to indicate that the …
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.
https://www.upcounsel.com/jewelry-patents
Nov 09, 2020 · Businesses protect their investments with patents. The patent process could take several months, so companies marked their patent-pending jewelry “PAT. PEND.,” “DESIGN PAT. PEND.,” or “DES. PAT. PEND.” after submitting a patent application to let …
http://iantiqueonline.ning.com/group/antiqueandvintagejewelry/forum/topics/pat-pend-on-vintage-jewelry
Feb 26, 2009 · There are design patents and there are utility patents. No doubt your PAT PEND mark is an indication that the utility patent for the clip mechanism on your earrings had been applied for. Utiltiy patents, once granted, are good for 17 years. Once patents expire, if not renewed, anyone can copy that design.
https://nativeamericanjewelrytips.wordpress.com/category/hallmarks/bennett-pat-pend/
Mar 22, 2017 · BENNETT PAT. PEND. If so, that refers to a person who designed and manufactured the first locking bolo slide clip about the mid 1950s and the slides carried this stamp BENNETT PAT. PEND. C-31 Although the above indicates that a patent had been applied for, there is no patent registered according to anything I have read.
https://www.drloriv.com/antique-tips/Trifari-Costume-Jewelry/
From the mid 1920s until about 1930, Trifari costume jewelry was marked with a “KTF” logo featuring an oversized central letter “T” which stood for Trifari. By the 1930s, the most common mark for Trifari pieces was the “TRIFARI PAT. PEND.” mark. This mark was used from the early 1930s.
http://www.midcenturyjewelry.com/tag/patent-pending/
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 ...
https://www.costumejewelrycollectors.com/vintage-costume-jewelry-research/research-resources/mechanical-and-utility-jewelry-patents/vintage-jewelry-patents-2/
Aug 24, 2019 · Also, visit Jewelry Patents, a large patent resource Jewelry Patents Definitions: A Design Patent only protects the appearance of an article, not it’s structural or functional features, and is usually used for decorative items.
http://www.patent-search-information.com/jewelrypatents.html
Aug 17, 2014 · Want to know more about the design of a vintage jewelry item? Or want to look at some classic jewelry designs? Jewelry design patents are a great source of information. Design patents are used to protect the appearance of a manufactured item.
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