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:
Sep. 04, 2001
Filed:
Jan. 18, 2000
Applicant:
Inventors:
Kazutoshi Watanabe, Fukushima-ken, JP;
Kazuhiro Yokoyama, Fukushima-ken, JP;
Katsuyuki Suzuki, Fukushima-ken, JP;
Satoru Takemori, Fukushima-ken, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H 9/00 ; G06G 3/02 ;
U.S. Cl.
CPC ...
H01H 9/00 ; G06G 3/02 ;
Abstract
The keyboard apparatus includes a plurality of key switches manipulated by keytops and a backlight means comprising an EL sheet for illuminating the operation side S constituted of the keytops from under it wherein the key switches are provided with permeable keytops and impermeable character portions and the backlight means has light emission positions allocated corresponding to key placements.