Granted Patent
Utility
US 6,097,293 · App. 09/292,135
Passive electrical marker for underground use and method of making thereof
Inventors:
George G. Galloway, Ronald L. McWilliams, John Moss, Kenneth D. Napps, Sean Nash, Paul R. Siglinger, William C. Wood
Patented Case
View Patent ↗
Granted: Aug 1, 2000
Filed: Apr 15, 1999
Inventors
George G. Galloway
Ronald L. McWilliams
John Moss
Kenneth D. Napps
Sean Nash
Paul R. Siglinger
William C. Wood
Assignee (at issue)
Industrial Technology Group, LLC
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.