Granted Patent
Utility
US 5,278,507 · App. 07/715,401
Well logging method and apparatus providing multiple depth of investigation using multiple transmitters and single receiver pair having depth of investigation independent of formation resistivity
Inventors:
Roger P. Bartel, M. Vikram Rao, Paul F. Rodney
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Jun 14, 1991
Inventors
Roger P. Bartel
M. Vikram Rao
Paul F. Rodney
Assignee (at issue)
Baroid Technology, 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.