Granted Patent
Utility
US 5,857,255 · App. 08/748,800
Apparatus and method for producing a metallic tube for light waveguides
Inventor:
Franz-Josef Wichmann
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: Nov 14, 1996
Inventor
Franz-Josef Wichmann
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.