Granted Patent
Utility
US 6,267,679 · App. 09/224,557
Method and apparatus for transferring drilling energy to a cutting member
Inventor:
Jack W. Romano
Patented Case
View Patent ↗
Granted: Jul 31, 2001
Filed: Dec 30, 1998
Inventor
Jack W. Romano
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.