Granted Patent
Utility
US 4,639,078 · App. 06/658,330
Optical fiber attenuator and method of fabrication
Inventor:
Sang K. Sheem
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Oct 5, 1984
Inventor
Sang K. Sheem
Assignee (at issue)
Rockwell International 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.