Granted Patent
Utility
US 4,982,801 · App. 07/293,514
Flexible coupling for downhole motor
Inventors:
Mark D. Zitka, Gary Wells
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Jan 4, 1989
Inventors
Mark D. Zitka
Gary Wells
Assignee (at issue)
Teleco Oilfield Services 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.