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. 23, 2006
Filed:
Aug. 19, 2004
Applicants:
Yukio Kanazawa, Yokohama, JP;
Tadashi Mori, Yokohama, JP;
Inventors:
Yukio Kanazawa, Yokohama, JP;
Tadashi Mori, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 47/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pair of electric contacts include a pair of first units which are provided on the surfaces of the end sides of the electric contacts, and generate light having first characteristics at the time of opening and closing of the electric contacts, and a pair of second units which are covered with the first units, and generate light having second characteristics differing from the first characteristics when abrasion of the first units reaches abrasion detection positions due to opening and closing of the electric contacts.