Granted Patent
Utility
US 5,544,881 · App. 08/183,389
Erasable scratch-off lottery ticket
Inventors:
Louis Rua, Jr., Stephen E. Martin
Patented Case
View Patent ↗
Granted: Aug 13, 1996
Filed: Jan 19, 1994
Inventors
Louis Rua, Jr.
Stephen E. Martin
Assignee (at issue)
Webcraft Technologies, 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.