Granted Patent
Utility
US 6,167,136 · App. 08/857,243
Method for preventing copying of digital video disks
Inventor:
Wayne W. Chou
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: May 16, 1997
Inventor
Wayne W. Chou
Assignee (at issue)
Software Security, 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.