Granted Patent
Utility
US 5,537,657 · App. 08/523,034
Telecommunications device with means for learning and responding to a distinctive ring cadence
Inventor:
Clarence Ray King, III
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Aug 31, 1995
Inventor
Clarence Ray King, III
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.