Granted Patent
Utility
US 5,320,179 · App. 07/925,100
Steering sub for flexible drilling
Inventors:
Albert E. Roos, Jr., Roger C. Leaf, Frederick J. Pittard, Jr.
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Aug 6, 1992
Inventors
Albert E. Roos, Jr.
Roger C. Leaf
Frederick J. Pittard, Jr.
Assignee (at issue)
Slimdril International 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.