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.

Date of Patent:
Aug. 13, 1996

Filed:

Nov. 22, 1993
Applicant:
Inventors:

Kenichi Takahashi, Toyohashi, JP;

Yoshikazu Naito, Toyokawa, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
371 221 ; 355203 ;
Abstract

A port diagnosing device capable of diagnosing normal or abnormal ports provided with a single input terminal and a plurality of output terminals comprising a signal generator for outputting predetermined signals to an optional output terminal from among a plurality of output terminals, a feedback signal for feeding back to the single input terminal predetermined signals output from the signal generator, and determining changes detected in the level of the signal fed back to the input terminal in correspondence to changes in the level of the predetermined signal, and determining the normal or abnormal operation of the optional output terminal.


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