Granted Patent
Utility
US 6,422,324 · App. 09/319,657
Method and device for driving bore-holes, in the sea bed using a counterflush method
Inventors:
Fritz Tibussek, Hermann Josef Von Wirth
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Aug 6, 1999
Inventors
Fritz Tibussek
Hermann Josef Von Wirth
Assignee (at issue)
Wirth Maschinen-und Bohrgerate-Fabrik 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.