Granted Patent
Utility
US 5,942,974 · App. 09/069,333
Door gasket resistance based intrusion alarm system
Inventors:
George Pfreundschuh, Mark Dombrowski
Patented Case
View Patent ↗
Granted: Aug 24, 1999
Filed: Apr 29, 1998
Inventors
George Pfreundschuh
Mark Dombrowski
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.