Granted Patent
Utility
US 5,911,119 · App. 08/729,876
Secure cordless telephone extension system and method
Inventors:
David Bartholomew, Scott R. Bullock, John M. Knab
Patented Case
View Patent ↗
Granted: Jun 8, 1999
Filed: Oct 15, 1996
Inventors
David Bartholomew
Scott R. Bullock
John M. Knab
Assignee (at issue)
Phonex 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.