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:
Mar. 28, 1989
Filed:
Feb. 25, 1986
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
2504581 ; 2504591 ; 356237 ; 358106 ;
Abstract
Method and apparatus for detecting wiring patterns wherein a printed circuit board is irradiated with a light ray which excites a substrate of the printed circuit board to generate a fluorescent radiation from the substrate, the fluorescent radiation generated from portions other than a wiring pattern of the printed circuit board is imaged by means of an image detector, and a negative pattern of the wiring pattern is detected on the basis of an image signal generated from the image detector.