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:
Dec. 19, 2006
Filed:
Apr. 02, 2002
Toshiyuki Sashihara, Tokyo, JP;
Ryuhei Fujiwara, Tokyo, JP;
Toshiyuki Sashihara, Tokyo, JP;
Ryuhei Fujiwara, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Private data in an EEPROM () is erased in a data erasing procedure when pulling out an SIM card () from a mobile telephone (). Before being erased, the private data is encrypted in an encryption procedure and it is transferred and recorded to an external memory (). The private data encrypted and recorded to the external memory can be reused when the SIM card is used in another mobile telephone. Furthermore, it is possible to prevent the external memory from being left behind when the SIM card is pulled out by interfacing a lock mechanism of a card mounting section () with that of a memory mounting section ().