Granted Patent
Utility
US 4,904,046 · App. 07/320,639
Process of and apparatus for leading an optical waveguide through a wall via a hermetic seal
Inventors:
Hartmut Paschke, Gerd Kreutzmann, Hrabanus Hack
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Mar 8, 1989
Inventors
Hartmut Paschke
Gerd Kreutzmann
Hrabanus Hack
Assignee (at issue)
Schott Glaswerke
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.