Granted Patent
Utility
US 6,732,817 · App. 10/078,067
Expandable underreamer/stabilizer
Inventors:
Charles H. Dewey, Wei Xu
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Feb 19, 2002
Inventors
Charles H. Dewey
Wei Xu
Assignee (at issue)
SMITH INTERNATIONAL, INC.
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.