Granted Patent
Utility
US 5,157,424 · App. 07/582,362
Method and apparatus for manufacturing tamper-resistant identification cards
Inventors:
Jack Craven, Robert Bilderback
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Sep 14, 1990
Inventors
Jack Craven
Robert Bilderback
Assignee (at issue)
NBS Imaging Systems, 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.