Granted Patent
Utility
US 5,311,569 · App. 07/893,613
Line-based public safety answering point
Inventors:
Joseph M. Brozovich, Nicholas DeVito, Douglas Craig Kroupa, Paul E. Renn, Paul M. Simek, David A. Snyder, James L. Turner
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: Jun 5, 1992
Inventors
Joseph M. Brozovich
Nicholas DeVito
Douglas Craig Kroupa
Paul E. Renn
Paul M. Simek
David A. Snyder
James L. Turner
Assignee (at issue)
AT&T Bell Laboratories
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.