Mak Magic mention the following on their web site:
"Mak Magic was founded in 1919 by U.F. 'Gen' Grant, inventor the U.F. Grant Line of Popular Magic.
He received recognition for having one of the most proficient minds in magic. He is the inventor of more magical effects than anyone in the history magic.
Mak still manufactures much of the U.F. Grant Popular line from the 1930's. His daughter, son-in-law, and grandson currently run the business."
This may prove to be a suitable point of reference. Their URL is: www.makmagic.com