Granted Patent
Utility
US 4,557,326 · App. 06/690,171
Well tool locking apparatus
Inventor:
Edward L. Bogard
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Jan 10, 1985
Inventor
Edward L. Bogard
Assignee (at issue)
Geosource, 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.