Granted Patent
Utility
US 6,411,713 · App. 09/202,395
Method of adaptive control of the presence of a copy protection signal
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Dec 9, 1998
Inventor
John O. Ryan
Assignee (at issue)
Macrovision Corporation
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.