Granted Patent
Utility
US 4,293,039 · App. 06/012,277
Non-rotating stabilizer for drill string
Inventors:
John Matthew Mullins, Joseph L. Kelly, Jr.
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Feb 15, 1979
Inventors
John Matthew Mullins
Joseph L. Kelly, Jr.
Assignee (at issue)
Hughes Tool Company LLC
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.