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. 10, 2007
Filed:
Jul. 01, 2003
Kiyoharu Oikawa, Kawasaki, JP;
Kimio Maruyama, Yokohama, JP;
Yasuhiro Watanabe, Yokohama, JP;
Naokazu Kuzuno, Kawasaki, JP;
Masaya Kubota, Kawasaki, JP;
Kiyoharu Oikawa, Kawasaki, JP;
Kimio Maruyama, Yokohama, JP;
Yasuhiro Watanabe, Yokohama, JP;
Naokazu Kuzuno, Kawasaki, JP;
Masaya Kubota, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A memory data protection system is disclosed, which comprises a memory circuit, a protection contents indicating section which stores a security bit and a protection bit, a protection function circuit which determines permission/prohibition of reading of data from the memory circuit and permission/prohibition of writing of data to the memory circuit in accordance with the security bit and the protection bit, and a protection function locking/unlocking circuit which makes the protection function circuit in a lock state to forcibly prohibit reading of data from the memory circuit and writing of data into the memory circuit in a time period from when a power supply is turned on till when the protection function circuit completes reading of the security bit and the protection bit from the protection contents indicating section into data buses, and after lapse of the time period, the protection function locking/unlocking circuit unlocks the lock state.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile