Granted Patent
Utility
US 4,479,539 · App. 06/434,723
Downhole lock system
Inventors:
Jack W. Tamplen, Carter R. Young
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Oct 18, 1982
Inventors
Jack W. Tamplen
Carter R. Young
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.