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:
May. 09, 1995
Filed:
Jul. 21, 1993
Applicant:
Inventor:
Kenneth G Leib, Wantagh, NY (US);
Assignee:
Northrop Grumman Corporation, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356359 ; 356345 ; 356392 ;
Abstract
Incorrectly assembled circuit boards become detected by directing interfering laser beams on the surface of a circuit board. Fringe patterns develop on the surfaces of electronic elements as well as the board proper. These fringe patterns are compared with those of a reference standard and anomalies become electronically detected.