Granted Patent
Utility
US 5,557,439 · App. 08/507,659
Expandable wavelength division multiplexed optical communications systems
Inventors:
Stephen B. Alexander, Steve W. Chaddick, Victor Mizrahi
Patented Case
View Patent ↗
Granted: Sep 17, 1996
Filed: Jul 25, 1995
Inventors
Stephen B. Alexander
Steve W. Chaddick
Victor Mizrahi
Assignee (at issue)
Ciena 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.