Granted Patent
Utility
US 4,625,115 · App. 06/680,308
Ceiling mountable passive infrared intrusion detection system
Inventor:
John K. Guscott
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Dec 11, 1984
Inventor
John K. Guscott
Assignee (at issue)
American District Telegraph Company
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.