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. 02, 2014
Filed:
Dec. 29, 2008
Applicant:
Yasunori Takeda, Tokyo, JP;
Inventor:
Yasunori Takeda, Tokyo, JP;
Assignee:
Polymatech Co., Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01D 11/28 (2006.01); H01H 9/00 (2006.01); H01H 13/83 (2006.01);
U.S. Cl.
CPC ...
H01H 13/83 (2013.01); H01H 2219/064 (2013.01); H01H 2219/056 (2013.01); H01H 2219/044 (2013.01); H01H 2219/034 (2013.01); H01H 2219/062 (2013.01); H01H 2219/03 (2013.01);
Abstract
Provided is a key sheet or a lightproof light guiding sheet guiding light efficiently through an interior of the key sheet and preventing light leakage through a periphery of key tops. On a base sheet, a transparent resin layer, and further, a lightproof dark print layer are provided as needed, with at least one of the transparent resin layer and the lightproof dark print layer being formed of a non-corrosive coating liquid. Further, a smooth surface is formed between the base sheet and the dark print layer.