Granted Patent
Utility
US 4,833,450 · App. 07/182,213
Fault detection in combination intrusion detection systems
Inventors:
Charles S. Buccola, Lawrence M. Kolb
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Apr 15, 1988
Inventors
Charles S. Buccola
Lawrence M. Kolb
Assignee (at issue)
NAPCO Security Systems, 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.