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:
Jan. 31, 2012
Filed:
Apr. 30, 2009
Applicant:
Koji Tanabe, Osaka, JP;
Inventor:
Koji Tanabe, Osaka, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 33/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A light guide sheet and a movable contact element using the sheet are inexpensive and provide adequate illumination. In the light guide sheet, light-transmissive upper conductive layers, reflective layers, and lower conductive layers are laminated in this order in predetermined positions on the bottom surface of a light-transmissive, film-like cover sheet. The reflective layers have reverse particles dispersed therein, whose top and bottom surfaces are reversed between light color and dark color.