Granted Patent
Utility
US 4,454,543 · App. 06/318,756
Dynamic video scrambling
Inventors:
John A. Lund, David L. Richardson, Graham S. Stubbs
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Nov 6, 1981
Inventors
John A. Lund
David L. Richardson
Graham S. Stubbs
Assignee (at issue)
Oak Industries Inc.
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.