Granted Patent
Utility
US 6,424,716 · App. 09/212,336
Method and apparatus for improved horizontal and vertical overlay signals for greater concealment in modern TV sets
Inventor:
Ronald Quan
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Dec 15, 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.