Granted Patent
Utility
US 4,234,895 · App. 06/000,671
Converting a video signal into a two-level signal
Inventors:
Rudiger Sommer, Hermann Wischer
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Jan 3, 1979
Inventors
Rudiger Sommer
Hermann Wischer
Assignee (at issue)
Dr. Ing. Rudolf Hell GmbH
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.