Granted Patent
Utility
US 5,185,503 · App. 07/800,907
Apparatus for attenuating Stoneley waves in a borehole
Inventor:
Jean Fortin
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Nov 26, 1991
Inventor
Jean Fortin
Assignee (at issue)
Campagnie 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.