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