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https://www.costumejewelrycollectors.com/vintage-costume-jewelry-research/costume-jewelry-marks/the-history-and-marks-of-coro-jewelry/
Aug 24, 2019 · Coro jewelry, Cohn & Rosenberger, was founded in New York by Emanuel Cohn and Carl Rosenberger in 1901/1902 and incorporated in 1913. A factory was established in Providence, Rhode Island in 1911. With offices or plants in New …
https://www.etsy.com/market/coro_copyright
Check out our coro copyright selection for the very best in unique or custom, handmade pieces from our shops.
https://imageevent.com/clios_vintage_jewelry/coropatents
CORO DESIGN PATENTS CORO DESIGNERS The career of Adolf Katz, Coro’s head designer, spanned nearly 40 years. According to patent records he appears to be a remarkably talented and prolific designer, holding more jewelry design patents in his name than anyone else in the industry.
https://www.demarctreasures.com/all-things-coro-corocraft-and-vendome.html
While companies could actually protect their designs with copyrights as early as 1947, most jewelry companies did not (except possibly Coro). It wasn't until Charel Jewelry Company copied some of Trifari's designs and Trifari took them to court and won (in 1955) that companies felt like their designs would actually be protected under the ...
https://www.demarctreasures.com/coro-patents.html
1930 Patents This is the first patent I was able to find so far for Coro (Cohn & Rosenberger). It was actually a utility patent # 1,783,223 filed for on July 19, 1929 and granted on Dec. 2, 1930. The designer on record was a man named Royal Marcher.
https://vintagejewelry.com/product-category/coro/
Item 1031: Coro Sterling Pin $ 145.00 Add to cart Item 105: Coro Pen $ 85.00 Add to cart Item 1057: Leaf Pin and Earrings Set $ 95.00 Add to cart Item 1095: Coro Bow Pin $ 150.00 Add to cart Item 113: Coro Set $ 85.00 Add to cart Item 1143: Coro Sterling Silver Fur Clip and Earrings
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