Granted Patent
Utility
US 5,070,941 · App. 07/574,815
Downhole force generator
Inventor:
Marion D. Kilgore
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: Aug 30, 1990
Inventor
Marion D. Kilgore
Assignee (at issue)
Otis Engineering Corporation
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.