Granted Patent
Utility
US 4,613,162 · App. 06/659,605
Misalignment tieback tool - non-rotating casing
Inventor:
David W. Hughes
Patented Case
View Patent ↗
Granted: Sep 23, 1986
Filed: Oct 12, 1984
Inventor
David W. Hughes
Assignee (at issue)
Vetco Offshore Industries, 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.