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https://www.antique-jewelry-investor.com/what-does-pat-on-the-clasp-mean-thats-the-only-word-or-number-comments.html
PAT stands for PATENT and usually refers to the right granted to anyone who invents any new, useful, and non-obvious process, machine, article of manufacture. The Jewelry manufcturer has a copyright on the design of the clasp.
https://www.upcounsel.com/jewelry-patents
Nov 09, 2020 · 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 people know that it was waiting for approval. Once the patent was approved, businesses could add their patent numbers to their jewelry.
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 patent …
https://www.jewelry-secrets.com/Blog/what-do-the-letters-mean/
Most people already know what some of the words and numbers mean, like 14K, PLAT, SS, .585 (and if not, see my full list of stamps and numbers here).But the letters that usually ajoin these are very different indeed. 9 times out of ten, they don’t refer to the ring at all.
https://www.jewelry-secrets.com/Blog/what-do-the-numbers-inside-your-ring-mean/
It’s the carat weight of the diamond (s) in your ring. If you have a diamond solitaire and you see.50 stamped inside the ring, that means the diamond is 1/2 carat..97 (like the ring in the photo) means that the diamond is 97 points, or just under one full carat (which is 100 points or 1.00 carat).
https://thinkengraved.com/blogs/news/a-guide-to-what-jewelry-stamps-mean
Jul 19, 2018 · These stamps stand for sterling silver. This means the piece of jewelry should be 92.5% pure silver mixed with another metal, usually copper. Silver on its own is very soft and needs another metal added to make solid jewelry. A common question that I get is “ I have a gold ring stamped 925, what does that mean?”
http://www.patent-search-information.com/jewelrypatents.html
Aug 17, 2014 · 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. Design patents pertain to the appearance of the item and protect the way an item looks.
https://community.ebay.com/t5/Archive-Jewelry-Gemstones/Do-you-know-how-old-this-ESEMCO-mark-is/td-p/18086887
Oct 30, 2013 · I looked on the illusion website but they don't have a time frame and the company has a long history. I don't see this particular mark on this shape either. Is anyone familiar with ESEMCO and the time period this may be from? Thank you. This is the tag on the chain. 10K on one side, ESEMCO o...
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