Granted Patent
Utility
US 4,638,153 · App. 06/611,998
Optical fibre sensing arrangements
Inventor:
John P. Dakin
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: May 18, 1984
Inventor
John P. Dakin
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.