Granted Patent
Utility
US 4,373,775 · App. 06/159,972
Fiber dichroic coupler
Inventor:
George A. Gasparian
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Jun 23, 1980
Inventor
George A. Gasparian
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.