Granted Patent
Utility
US 4,302,630 · App. 06/094,123
Telephonic answering device
Inventors:
Alessandro Imgegnoli, Corona Ennio
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Nov 14, 1979
Inventors
Alessandro Imgegnoli
Corona Ennio
Assignee (at issue)
International Standard Electric 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.