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:
Aug. 27, 1991
Filed:
Oct. 25, 1989
Applicant:
Inventor:
Takamasa Chiba, Kanagawa, JP;
Assignee:
Graphtec Kabushikikaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G01R / ;
U.S. Cl.
CPC ...
364489 ; 364488 ; 36455101 ; 371 251 ; 371 221 ;
Abstract
A printed circuit board function testing system compares permissible range data to a waveform signal obtained from a given measuring point of a non-defective circuit board in actual operation and a waveform signal obtained from a corresponding given measuring point of a test circuit board in actual operation to judge whether the test circuit board is defective or not.