Granted Patent
Utility
US 4,631,361 · App. 06/625,865
Programmable ring generator
Inventor:
Robert L. Miller
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: Jun 28, 1984
Inventor
Robert L. Miller
Assignee (at issue)
ITT Corporation
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.