Granted Patent
Utility
US 5,604,627 · App. 08/599,817
Optical amplifier device
Inventor:
Ulrich Kohn
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Feb 12, 1996
Inventor
Ulrich Kohn
Assignee (at issue)
Robert Bosch GmbH
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.