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:
Jul. 03, 2012
Filed:
Sep. 29, 2009
Applicants:
Takuma Mitsunaga, Tokyo, JP;
Takuma Tominaga, Tokyo, JP;
Hiroyuki Ohba, Tokyo, JP;
Kenzo Kita, Tokyo, JP;
Inventors:
Takuma Mitsunaga, Tokyo, JP;
Takuma Tominaga, Tokyo, JP;
Hiroyuki Ohba, Tokyo, JP;
Kenzo Kita, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 13/00 (2006.01); G06F 13/28 (2006.01); G06F 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a case where at least one of physical blocks composing the virtual block becomes a defective block, use of the virtual block to which the defective block belongs is forbidden and the virtual block of which use is forbidden is managed as a defective virtual block. Replacing the defective block with a normal block is performed among the defective virtual blocks so as to generate the virtual block to which the defective block does not belong. Then use of the virtual block generated is allowed.