Granted Patent
Utility
US 6,697,558 · App. 09/772,489
Raman amplified optical system with reduction of four-wave mixing effects
Inventors:
Per Bang Hansen, Robert Bumju Lee, Seo-Yeon Park, William Alfred Reed, Andrew John Stentz
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Jan 30, 2001
Inventors
Per Bang Hansen
Robert Bumju Lee
Seo-Yeon Park
William Alfred Reed
Andrew John Stentz
Assignee (at issue)
Fitel USA Corp.
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.