Granted Patent
Utility
US 5,491,764 · App. 08/251,086
Narrowband twisted optical fiber wavelength division multiplexer
Inventors:
Andong Hu, Douglas P. Bonnell
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: May 31, 1994
Inventors
Andong Hu
Douglas P. Bonnell
Assignee (at issue)
Tacan 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.