Granted Patent
Utility
US 4,852,149 · App. 07/213,068
Automated call filter
Inventors:
Nicholas Zwick, Charles R. Walden Jr., Louis Francz, Jay L. Gerbehy
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Jun 29, 1988
Inventors
Nicholas Zwick
Charles R. Walden Jr.
Louis Francz
Jay L. Gerbehy
Assignee (at issue)
Dialogic 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.