Granted Patent
Utility
US 4,945,559 · App. 07/433,572
Telephone network interface apparatus
Inventors:
Thomas J. Collins, Pina Schneider, Anthony L. Nieves, Thomas Graham
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Nov 7, 1989
Inventors
Thomas J. Collins
Pina Schneider
Anthony L. Nieves
Thomas Graham
Assignee (at issue)
Keptel, 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.