Granted Patent
Utility
US 6,668,656 · App. 10/191,710
Optical sensor having differing diameters
Inventors:
Mark R. Fernald, Timothy J. Bailey, Matthew B. Miller, James M. Sullivan, James Dunphy, Michael A. Davis, Christopher J. Wright, Alan D. Kersey, Martin A. Putnam, Robert N. Brucato, Paul E. Sanders
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Jul 9, 2002
Inventors
Mark R. Fernald
Timothy J. Bailey
Matthew B. Miller
James M. Sullivan
James Dunphy
Michael A. Davis
Christopher J. Wright
Alan D. Kersey
Martin A. Putnam
Robert N. Brucato
Paul E. Sanders
Assignee (at issue)
Weatherford/Lamb, 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.