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:
May. 08, 2007
Filed:
Mar. 22, 2002
Junichi Ando, Atsugi, JP;
Masao Fukaya, Atsugi, JP;
Junichi Ando, Atsugi, JP;
Masao Fukaya, Atsugi, JP;
Mitsumi Electric Co., Ltd., , JP;
Abstract
An optical disc drive that can surely erase the trial writing data recorded in the Test Area is disclosed. The optical disc drive of the present invention has a rotation driving mechanism for rotating a loaded optical disc, and an optical pick-up capable of recording data to the optical disc by emitting a laser beam onto the optical disc drive. In the erasing procedure for erasing the trial writing data recorded in the Test Area, CW erase procedure is carried out and the optical disc drive tries to reproduce the trial writing data. Then, it is determined whether an HF signal is detected or not, and the CW erase procedure is carried out again in the case where the HF signal is detected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile