Granted Patent
Utility
US 4,468,787 · App. 06/319,632
Ternary data transmission system
Inventor:
Francis P. Keiper, Jr.
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Nov 9, 1981
Inventor
Francis P. Keiper, Jr.
Assignee (at issue)
Lear Siegler, Inc.
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.