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.:

US 7791995 B1

PDF
Full Text
Expired
Date of Patent:
Sep. 07, 2010

Filed:

Jan. 30, 2007
Applicants:

Tsuyoshi Yamamoto, Gunma, JP;

Katsuhiko Masuda, Gunma, JP;

Shigefumi Morishima, Gunma, JP;

Toru Tanaka, Gunma, JP;

Inventors:

Tsuyoshi Yamamoto, Gunma, JP;

Katsuhiko Masuda, Gunma, JP;

Shigefumi Morishima, Gunma, JP;

Toru Tanaka, Gunma, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

An image information detecting apparatus is disclosed that comprises: a semiconductor laser that emits a laser light beam; a light receiving unit that receives a reflected light beam of the laser light beam applied to a color changing layer of an optical disc, the color changing layer being formed from a photo-sensitive material of a heat-sensitive material, and that outputs an electrical signal corresponding to the level of the reflected light beam; and a detecting unit that detects image information based on the electric signal, wherein the image information detecting apparatus detects the image information indicating an image from the color changing layer after the image has been formed therein.


Find Patent Forward Citations

Yamamoto, Tsuyoshi. (2010). Image information detecting apparatus (U.S. Patent No. 7791995). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7791995

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