Granted Patent
Utility
US 4,414,734 · App. 06/326,083
Triad for rock bit assembly
Inventor:
Gerald O. Atkinson
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Nov 30, 1981
Inventor
Gerald O. Atkinson
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.