Granted Patent
Utility
US 6,730,392 · App. 09/804,627
Hard layer coated parts
Inventors:
Jörg Vetter, Rainer Hans
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Mar 9, 2001
Inventors
Jörg Vetter
Rainer Hans
Assignee (at issue)
Metaplas Ionon Oberflachenveredelungstechnik GmbH
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.