Granted Patent
Utility
US 5,555,342 · App. 08/373,346
Planar waveguide and a process for its fabrication
Inventors:
Christoph Buchal, Theo Siegrist
Patented Case
View Patent ↗
Granted: Sep 10, 1996
Filed: Jan 17, 1995
Inventors
Christoph Buchal
Theo Siegrist
Assignee (at issue)
LUCENT TECHNOLOGIES INC.
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.