Granted Patent
Utility
US 4,690,488 · App. 06/606,507
Compensation for optical damage of directional-coupler switches
Inventors:
Caroline M. Gee, Gary D. Thurmond
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: May 3, 1984
Inventors
Caroline M. Gee
Gary D. Thurmond
Assignee (at issue)
Hughes Aircraft Company
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.