Granted Patent
Utility
US 4,600,921 · App. 06/543,588
Full-field teletext system with dynamic addressability
Inventor:
William L. Thomas
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Oct 19, 1983
Inventor
William L. Thomas
Assignee (at issue)
Zenith Radio Corporation
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.