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. 06, 2001
Filed:
Mar. 13, 2000
Masaki Uekubo, Tokyo, JP;
Shogo Miike, Kawasaki, JP;
NEC Corporation, Tokyo, JP;
Abstract
A nonvolatile memory device is provided capable of shipping after setting it as a flash memory or as a one-time memory, and which cannot be altered to a flash memory once it has been used as a one-time memory. The nonvolatile memory device of the present invention has a circuit structure such that when a nonvolatile memory receives an instruction of prohibiting erasure of internal data, the instruction is stored by setting a prescribed flag provided in the nonvolatile memory at a predetermined value, and the content of the present nonvolatile memory cannot be erased after packaging, so that it is impossible for a user to alter the values of the flag which indicates whether erasure of data is prohibited or permitted.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile