Granted Patent
Utility
US 4,477,847 · App. 06/048,357
Television signal disc drive recorder
Inventors:
Howard W. Knight, Edwin W. Engberg
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Jun 14, 1979
Inventors
Howard W. Knight
Edwin W. Engberg
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.