Granted Patent
Utility
US 4,410,982 · App. 06/261,405
Arrangement for extending digital signaling to telephone subscribers' substations
Inventors:
Gerald Fleischfresser, Alex W. Kobylar
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: May 7, 1981
Inventors
Gerald Fleischfresser
Alex W. Kobylar
Assignee (at issue)
GTE Automatic Electric Labs Inc.
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.