Granted Patent
Utility
US 4,276,568 · App. 06/065,442
Boosting video signals
Inventor:
Hermann Wischer
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Aug 10, 1979
Inventor
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.