Granted Patent
Utility
US 5,187,768 · App. 07/810,317
Fiber optic variable signal attenuator
Inventors:
Conrad L. Ott, David E. Wuestmann, Louis Maiolo
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Dec 19, 1991
Inventors
Conrad L. Ott
David E. Wuestmann
Louis Maiolo
Assignee (at issue)
Porta Systems 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.