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:
Mar. 21, 2006
Filed:
Dec. 31, 2003
Tatsuya Kato, Kanagawa, JP;
Masaki Yoshida, Tokyo, JP;
Katsumi Ikeda, Kanagawa, JP;
Yoshihisa Takayama, Kanagawa, JP;
Tatsuya Kato, Kanagawa, JP;
Masaki Yoshida, Tokyo, JP;
Katsumi Ikeda, Kanagawa, JP;
Yoshihisa Takayama, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A tape cassette of this invention is equipped with a memory capable of accommodating management information. The memory retains an MIC logical format type designating a format state, either formatted or unformatted, of the magnetic tape. A check is made on the consistency between the format state designated by the MIC logical format type and the format state estimated by reading data from the magnetic tape. If an inconsistency is detected, that is interpreted to mean that the tape cassette has been tampered with, and read and write operations on the cassette are controlled accordingly. This enhances security against fraudulent uses of a tape drive system loaded with the tape cassette.