Granted Patent
Utility
US 5,659,613 · App. 08/473,047
Method and apparatus for copy protection for various recording media using a video finger print
Inventors:
Gregory Clark Copeland, John O. Ryan
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jun 7, 1995
Inventors
Gregory Clark Copeland
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.