Granted Patent
Utility
US 4,878,730 · App. 07/264,426
Fiber optic attenuator
Inventor:
Stephen W. Wall
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Oct 31, 1988
Inventor
Stephen W. Wall
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.