Granted Patent
Utility
US 5,325,459 · App. 08/016,583
Optical attenuator used with optical fibers and compensation means
Inventor:
Siegmar Schmidt
Patented Case
View Patent ↗
Granted: Jun 28, 1994
Filed: Feb 10, 1993
Inventor
Siegmar Schmidt
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.