Granted Patent
Utility
US 5,229,554 · App. 07/815,662
Downhole electro-hydraulic vertical shear wave seismic source
Inventor:
Jack H. Cole
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Dec 31, 1991
Inventor
Jack H. Cole
Assignee (at issue)
Conoco 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.