Granted Patent
Utility
US 5,492,375 · App. 08/278,419
Drill pipe with improved connectors
Inventor:
Jackie E. Smith
Patented Case
View Patent ↗
Granted: Feb 20, 1996
Filed: Jul 21, 1994
Inventor
Jackie E. Smith
Assignee (at issue)
Grant TFW, 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.