Granted Patent
Utility
US 5,226,017 · App. 07/752,456
Method and apparatus for acquiring borehole seismic data in two opposite directions
Inventor:
Jean Fortin
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Aug 19, 1991
Inventor
Jean Fortin
Assignee (at issue)
Compagnie Generale de Geophysique
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.