Granted Patent
Utility
US 4,266,851 · App. 06/091,914
Coupler for a concentric core optical fiber
Inventor:
Glenn C. Salisbury
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Nov 6, 1979
Inventor
Glenn C. Salisbury
Assignee (at issue)
International Telephone and Telegraph Corporation
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.