Granted Patent
Utility
US 6,404,857 · App. 09/500,800
Signal monitoring apparatus for analyzing communications
Inventors:
Christopher Douglas Blair, Roger Louis Keenan
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Feb 10, 2000
Inventors
Christopher Douglas Blair
Roger Louis Keenan
Assignee (at issue)
Eyretel Limited
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.