Granted Patent
Utility
US 4,603,750 · App. 06/656,825
Replaceable bit nozzle
Inventor:
Robert Sorenson
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Oct 2, 1984
Inventor
Robert Sorenson
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.