Granted Patent
Utility
US 6,246,821 · App. 09/438,834
Optical waveguide with protective tube
Inventors:
Heinz Hemken, Wolfgang Scheideler, Helmut Steinberg, Peter Zamzow
Patented Case
View Patent ↗
Granted: Jun 12, 2001
Filed: Nov 12, 1999
Inventors
Heinz Hemken
Wolfgang Scheideler
Helmut Steinberg
Peter Zamzow
Assignee (at issue)
ALCATEL
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.