Granted Patent
Utility
US 6,278,549 · App. 09/551,138
Optical filter having a quartz substrate
Inventor:
Carl Gaebe
Patented Case
View Patent ↗
Granted: Aug 21, 2001
Filed: Apr 17, 2000
Inventor
Carl Gaebe
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.