Granted Patent
Utility
US 4,404,426 · App. 04/197,203
Cryptographic telegraphy programming system
Inventor:
Laurance F. Safford
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: May 23, 1962
Inventor
Laurance F. Safford
Assignee (at issue)
American Standard 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.