Granted Patent
Utility
US 4,332,977 · App. 04/201,985
Teletypewriter privacy system
Inventor:
Laurance F. Safford
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Jun 12, 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.