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:
Sep. 09, 2003

Filed:

Nov. 16, 1999
Applicant:
Inventors:

Shinzi Hironaka, Saitama, JP;

Osamu Tsurumiya, Saitama, JP;

Akio Kobayashi, Saitama, JP;

Yoshiki Noro, Saitama, JP;

Yoshinobu Mukai, Saitama, JP;

Susumu Ohta, Saitama, JP;

Takao Kurosawa, Saitama, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 7/04 ;
U.S. Cl.
CPC ...
F21V 7/04 ;
Abstract

A current detecting apparatus comprises a determining unit which determines whether the electric potential of a first node or a second node is in a predetermined range. When the condition that the electric potential is not in the predetermined range continues longer than the predetermined period of time, the determining signal indicating the damage occurrence is outputted. Accordingly, the damage of the constituting elements can exactly be determined with the relatively simple configuration in a short time.


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