Granted Patent
Utility
US 4,639,882 · App. 06/621,720
Monitoring system
Inventor:
Albert B. Keats
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Jun 18, 1984
Inventor
Albert B. Keats
Assignee (at issue)
United Kingdom Atomic Energy Authority
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.