Granted Patent
Utility
US 4,916,736 · App. 07/203,676
Method and apparatus for encrypting and decrypting time domain signals
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Jun 7, 1988
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.