Granted Patent
Utility
US 4,568,974 · App. 06/437,349
Video scrambling by the application of a variable periodic scrambling waveform
Inventors:
Pieter den Toonder, Dennis E. Burke, Ronald Forbes, James Stoffer
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Oct 28, 1982
Inventors
Pieter den Toonder
Dennis E. Burke
Ronald Forbes
James Stoffer
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.