Granted Patent
Utility
US 5,584,342 · App. 08/471,774
Subterranean rotation-inducing device and method
Inventor:
Jerry L. Swinford
Patented Case
View Patent ↗
Granted: Dec 17, 1996
Filed: Jun 6, 1995
Inventor
Jerry L. Swinford
Assignee (at issue)
Ponder 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.