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:
Apr. 01, 2008
Filed:
Apr. 28, 2003
Sung-hyun Kim, Gyeonggi-do, KR;
Sung-Hyun Kim, Gyeonggi-do, KR;
Abstract
A computer system such as a smart card includes first, second and third memory areas. The first memory area may be a general code area, and stores therein at least one general application program including at least one subroutine call to the second memory area. The second memory area may be a vector table area, and stores therein at least one subroutine call to the third memory area. The third memory area may be a security code area, and stores therein at least one security application program that is only callable by a subroutine call from the second memory area. A processing system is configured to execute a general application program in the first memory area, including a subroutine call to the second memory area, and to unlock the third memory area only upon executing a subroutine call from the first memory area to the second memory area.