Granted Patent
Utility
US 6,385,380 · App. 09/294,686
Hollow optical waveguide for trace analysis in aqueous solutions
Inventors:
Karl Friedrich, Peter Dress, Mathias Belz
Patented Case
View Patent ↗
Granted: May 7, 2002
Filed: Apr 19, 1999
Inventors
Karl Friedrich
Peter Dress
Mathias Belz
Assignee (at issue)
World Precision Instruments
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.