Granted Patent
Utility
US 6,780,564 · App. 10/209,376
Methods and apparatus for rendering an optically encoded medium unreadable and tamper-resistant
Inventors:
Nabil Lawandy, Charles M. Zepp, Andrei Smuk, Marianne Krieg-Kowald
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Jul 30, 2002
Inventors
Nabil Lawandy
Charles M. Zepp
Andrei Smuk
Marianne Krieg-Kowald
Assignee (at issue)
Flexplay 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.