Granted Patent
Utility
US 4,375,034 · App. 06/173,124
Passive infrared intrusion detection system
Inventor:
John K. Guscott
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Jul 28, 1980
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.