Granted Patent
Utility
US 4,714,120 · App. 07/042,546
Diamond drill bit with co-joined cutters
Inventor:
William W. King
Patented Case
View Patent ↗
Granted: Dec 22, 1987
Filed: Apr 23, 1987
Inventor
William W. King
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.