Granted Patent
Utility
US 5,670,878 · App. 08/080,295
Inspecting a conductive object with a steady state magnetic field and induced eddy current
Inventors:
Keith W. Katahara, Pedro F. Lara, Kenneth R. Riggs
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Jun 21, 1993
Inventors
Keith W. Katahara
Pedro F. Lara
Kenneth R. Riggs
Assignee (at issue)
Atlantic Richfield Company
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.