To Identify Vintage Cut-Glass Patterns, you have to check for a trademark cut into the glass or attached on a paper label. After that, get a catalog or reputable volume on the subject of cut glass from the “brilliant period.” You need to try to find a vintage catalog from a glass house that displayed examples of patterned glass. You should compare the patterns on your glass to those listed in the catalog. Then, Consult a collector forum.
You should Post pictures of your piece on a collector website like American Brilliant Period Cut Glass. Next, look for similar patterns at antique shops, swap meets or estate sales. You can explore the possibility that the owner of a matching piece can identify the pattern for you.