Granted Patent
Utility
US 4,532,507 · App. 06/549,632
Security system with multiple levels of access
Inventors:
James B. Edson, Patrick G. Monroe
Patented Case
View Patent ↗
Granted: Jul 30, 1985
Filed: Nov 4, 1983
Inventors
James B. Edson
Patrick G. Monroe
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.