Granted Patent
Utility
US 4,759,415 · App. 07/063,727
Rock bit with improved extended nozzle
Inventor:
Rudolf Carl Pessier
Patented Case
View Patent ↗
Granted: Jul 26, 1988
Filed: Jun 15, 1987
Inventor
Rudolf Carl Pessier
Assignee (at issue)
Hughes Tool Company - USA
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.