Granted Patent
Utility
US 4,434,322 · App. 06/286,356
Coded data transmission system
Inventor:
Philip J. Ferrell
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Jul 23, 1981
Inventor
Philip J. Ferrell
Assignee (at issue)
Racal Data Communications, 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.