Granted Patent
Utility
US 6,434,989 · App. 09/883,982
Method and device for producing leadthroughs on hollow profiles
Inventor:
Uwe Hardtke
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Jun 20, 2001
Inventor
Uwe Hardtke
Assignee (at issue)
Daimlerchrysler AG
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.