Granted Patent
Utility
US 4,249,207 · App. 06/097,551
Perimeter surveillance system
Inventors:
R. Keith Harman, John W. Patchell
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Nov 26, 1979
Inventors
R. Keith Harman
John W. Patchell
Assignee (at issue)
Computing Devices 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.