Granted Patent
Utility
US 4,814,705 · App. 07/016,576
Method and apparatus for magnetic discontinuity detection in a specimen of magnetizable material
Inventor:
David H. Saunderson
Patented Case
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Granted: Mar 21, 1989
Filed: Feb 19, 1987
Inventor
David H. Saunderson
Assignee (at issue)
The Secretary of State for United Kingdom Atomic Energy Authority in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
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.