Granted Patent
Utility
US 4,582,956 · App. 06/513,080
Method and apparatus for displaying at a selected station special service information during a silent interval between ringing
Inventor:
Carolyn A. Doughty
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Jul 12, 1983
Inventor
Carolyn A. Doughty
Assignee (at issue)
AT&T Bell Laboratories
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.