Granted Patent
Utility
US 4,340,906 · App. 06/149,708
Video signal coding by video signal polarity reversal on the basis of brightness level comparison
Inventors:
Pieter den Toonder, Johannes C. Seltenrijch, Graham S. Stubbs, Pieter J. Fondse, Howard F. Jirka
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: May 14, 1980
Inventors
Pieter den Toonder
Johannes C. Seltenrijch
Graham S. Stubbs
Pieter J. Fondse
Howard F. Jirka
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.