Granted Patent
Utility
US 4,191,376 · App. 05/763,639
Highly secure playing cards for instant lottery and games
Inventors:
Max Goldman, Carl Alexoff
Patented Case
View Patent ↗
Granted: Mar 4, 1980
Filed: Jan 28, 1977
Inventors
Max Goldman
Carl Alexoff
Assignee (at issue)
Systems Operations, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.