Granted Patent
Utility
US 6,058,191 · App. 08/794,797
Method and apparatus for modifying the envelope of a RF carrier signal to remove copy protection signals therefrom
Inventor:
Ronald Quan
Patented Case
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Granted: May 2, 2000
Filed: Feb 4, 1997
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.