Granted Patent
Utility
US 6,173,109 · App. 09/414,912
Method and apparatus for removing or defeating effects of copy protection signals from a video signal
Inventor:
Ronald Quan
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Oct 8, 1999
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.