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. 13, 2001
Filed:
Apr. 03, 1998
Hirofumi Nagano, Yokohama, JP;
Hideharu Eguchi, Yokosuka, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A first laser beam and a second laser beam are selectively generated. The first or the second laser beam is irradiated on an optical storage medium having a recording layer on which main data has been recorded. The main data includes data to be reproduced and reproduction management data. The laser beam selection is made according to the reproduction management data. The first laser beam has a first laser power capable of carrying the main data without erasing when reflected from the optical storage medium. On the other hand, the second laser beam has a second laser power capable of erasing the main data from the optical storage medium while carrying the main data when reflected from the optical storage medium. The data to be reproduced and carried by the first or the second laser beam is then reproduced.