Granted Patent
Utility
US 4,465,902 · App. 06/433,344
Digital space phone system
Inventor:
Thomas J. Zato
Patented Case
View Patent ↗
Granted: Aug 14, 1984
Filed: Oct 8, 1982
Inventor
Thomas J. Zato
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.