Granted Patent
Utility
US 6,681,611 · App. 10/196,289
Process and device for manufacturing holes on the circumference of hollow sections
Inventors:
Ulrich Haag, Uwe Hardtke, Thomas Huelsberg
Patented Case
View Patent ↗
Granted: Jan 27, 2004
Filed: Jul 17, 2002
Inventors
Ulrich Haag
Uwe Hardtke
Thomas Huelsberg
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.