Granted Patent
Utility
US 4,861,980 · App. 07/131,168
Optical sensor having stationary co-terminus ends of the input and output optical fibres
Inventors:
John P. Dakin, Christopher Wade
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Dec 10, 1987
Inventors
John P. Dakin
Christopher Wade
Assignee (at issue)
Plessey Overseas Limited
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.