The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 1990
Filed:
Dec. 09, 1988
Applicant:
Inventors:
Walter Klopfer, Mossingen, DE;
Fritz Haug, Pliezhausen, DE;
Dale Gabauer, Freedom, PA (US);
James Workley, Imperial, PA (US);
Assignee:
Institut Dr. Friedrich Forster Prufgeratebau GmbH & Co. KG, Ruetlingen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
324232 ; 324227 ; 324241 ;
Abstract
Detection of both surface defects of a non-ferromagnetic test body as well s the presence of ferromagnetic particles in the test body by inducing eddy currents and D.C. fields in the body. The resulting signal voltages are filtered and separately examined.