Granted Patent
Utility
US 4,243,845 · App. 06/005,540
Repertory telephone dialing apparatus
Inventors:
Martin Feinberg, John DeFilippis, Ting-Wah Wong
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Jan 22, 1979
Inventors
Martin Feinberg
John DeFilippis
Ting-Wah Wong
Assignee (at issue)
International Telephone and Telegraph 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.