Granted Patent
Utility
US 6,073,473 · App. 09/037,748
Device for corrugating tubes
Inventor:
Gerhard Ziemek
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Mar 10, 1998
Inventor
Gerhard Ziemek
Assignee (at issue)
ALCATEL
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.