Granted Patent
Utility
US 6,763,902 · App. 09/814,916
Rockbit with attachable device for improved cone cleaning
Inventors:
James L. Larsen, Dwayne P. Terracina
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Mar 22, 2001
Inventors
James L. Larsen
Dwayne P. Terracina
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.