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. 25, 2006
Filed:
Dec. 20, 2002
Toshikatsu Hosoi, Tokyo, JP;
Toshikatsu Hosoi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
When a casing opening/closing detection circuit detects folding of a casing, a control circuit transmits an interruption signal to a CPU. Upon reception of the interruption signal, the CPU backs up data, which is to be protected and stored in a RAM, by transferring it to a FLASH ROM through a bus. In addition, when a battery residual amount detection circuit detects that a battery residual amount has dropped below a predetermined value because it was left unattended for a long time, the information of detection is similarly transmitted through an interruption signal to the CPU. By using the CPU for executing backing-up, and by using a battery falling-off prevention lock to impose physical restrictions in order to prevent falling-off of a battery during use of a cellular phone, data loss caused by unexpected occurrence such as battery falling-off can be dealt with.