Granted Patent
Utility
US 5,513,260 · App. 08/267,635
Method and apparatus for copy protection for various recording media
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Jun 29, 1994
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.