Granted Patent
Utility
US 5,138,683 · App. 07/729,335
Optical transmission element having a two-layer protective sheath and the method of manufacture
Inventors:
Ulrich Oestreich, Wilfried Reissenweber
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Jul 12, 1991
Inventors
Ulrich Oestreich
Wilfried Reissenweber
Assignee (at issue)
Siemens Aktiengesellschaft
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.