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:
Jun. 25, 1996
Filed:
Dec. 03, 1993
Ryohei Higuchi, Itami, JP;
Masayuki Hirokawa, Itami, JP;
Kenji Kouda, Itami, JP;
Masahide Kaneko, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a read only memory, compression data of original data are stored in a storage unit, a read address which is given from the outside in order to read original data is converted into a storage address of the compression data in the storage unit which corresponds to the original data, the compression data which is read out in accordance with the converted storage address is expanded to restore the original data, and the restored original data is read out to the outside. In order to make it difficult for an unauthorized person to use the ROM, dummy address conversion data are mixed with address conversion data.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile