Granted Patent
Utility
US 6,518,533 · App. 09/998,852
High strength steel tubing
Inventor:
David S. Haghiri
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Nov 1, 2001
Inventor
David S. Haghiri
Assignee (at issue)
LTV Steel Company, 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.