Granted Patent
Utility
US 6,270,136 · App. 09/353,017
Tong for well pipe
Inventor:
Daniel Dagenais
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Jul 13, 1999
Inventor
Daniel Dagenais
Assignee (at issue)
Farr Canada Ltd.
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.