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. 19, 2013
Filed:
Nov. 18, 2009
Yutaka Ishikawa, Osaka, JP;
Kazuya Ishihara, Osaka, JP;
Yoshiji Ohta, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A nonvolatile semiconductor memory device in which a memory cell life can be prolonged while making it possible to perform writing in units of bits. When command information represents writing, a comparing unitcompares written data in a target memory cell with write target data to give a comparison result to a write/read control unit, when the comparison result represents matching, the write/read control unitdoes not instruct a decoder unit (A,B, and) to perform writing in the target memory cell, and when the comparison result represents mismatching, the write/read control unitinstructs the decoder unit to write the write target data in the target memory cell.