Costume Jewelry Collectors
Presents
an original publication by RCJ and Dorothea Stringfield

Want to know the difference in a patent, a copyright or trademark?    Visit the US Patent Website!

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.

A Utility Patent protects the structure and function of the invention.

*Written permission necessary to use information or pictures from this site in any other publications, written or electronic.

Cartier Jewelry Patents

Jewelry Utility Patents 1911 – 1929 1930 – 1939 1940 – 1959 1960 – 1979

Trifari Jewelry Patents 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949

Copyright 1997 to present — www.costumejewelrycollectors.com — All Rights Reserved.
All RCJ publications and pages were created
by Dotty Stringfield with the assistance of research contributor Pat Seal
and other valued members of the costume jewelry collecting community.