Granted Patent
Utility
US 6,088,144 · App. 08/713,491
Detection of frequency-modulated tones in electromagnetic signals
Inventor:
Christopher Doerr
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Sep 13, 1996
Inventor
Christopher Doerr
Assignee (at issue)
LUCENT TECHNOLOGIES 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.