Granted Patent
Utility
US 4,622,541 · App. 06/569,527
Intrusion detection system
Inventor:
Roy Stockdale
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: Jan 9, 1984
Inventor
Roy Stockdale
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.