Granted Patent
Utility
US 4,242,540 · App. 06/004,436
Automatic telephone answering device including a display for displaying indications of the various operating modes of the device
Inventors:
Aldo Franchi, Giuseppe Allerino
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Jan 18, 1979
Inventors
Aldo Franchi
Giuseppe Allerino
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.