Granted Patent
Utility
US 6,472,993 · App. 09/982,357
Singular housing window or door intrusion detector using earth magnetic field sensor
Inventor:
Kenneth L. Addy
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Oct 16, 2001
Inventor
Kenneth L. Addy
Assignee (at issue)
Pittway 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.