Granted Patent
Utility
US 6,590,979 · App. 09/171,856
Method and apparatus for compression compatible video scrambling
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Oct 23, 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.