Granted Patent
Utility
US 5,818,980 · App. 08/808,043
Polarization-independent, tunable, acousto-optical waveguide device for the wavelength selection of an optical signal
Inventor:
Harald Herrmann
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Mar 4, 1997
Inventor
Harald Herrmann
Assignee (at issue)
Pirelli Cavi S.p.A.
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.