Granted Patent
Utility
US 4,837,620 · App. 07/193,463
Teletext receiver with page up and page down functions
Inventor:
Timothy J. Harvey
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: May 12, 1988
Inventor
Timothy J. Harvey
Assignee (at issue)
Zenith Electronics LLC
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.