Granted Patent
Utility
US 5,574,787 · App. 08/279,542
Apparatus and method for comprehensive copy protection for video platforms and unprotected source material
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Jul 25, 1994
Inventor
John O. Ryan
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.