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:
Feb. 03, 2004
Filed:
Feb. 25, 2002
Applicant:
Inventors:
Shigetaka Douzono, Fukui, JP;
Yoshiharu Abe, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H 3/12 ;
U.S. Cl.
CPC ...
H01H 3/12 ;
Abstract
A cup-shaped elastic member forces push button upwardly that has indication part A formed thereon. Light transmitting electrode layer B, light-emitting layer C, and back electrode layer E are sequentially formed on light transmitting sheet A to form EL element , and the EL element is disposed on the upper or lower face of membrane switch . This structure can provide an inexpensive illuminated keyboard switch that allows clear illumination of the push button and uses a smaller number of components.