Granted Patent
Utility
US 4,258,255 · App. 06/032,337
Infrared intrusion detection system
Inventor:
John K. Guscott
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Apr 23, 1979
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.