Granted Patent
Utility
US 5,953,417 · App. 09/137,357
Method and apparatus for digitally removing or defeating effects of copy protection signals from a video signal
Inventor:
Ronald Quan
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Aug 20, 1998
Inventor
Ronald Quan
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.