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:
Nov. 30, 2004
Filed:
Dec. 06, 2000
Scott Bates Guthery, Newton, MA (US);
Mary Joanne Kiernan Cronin, Newton, MA (US);
Mobile-Mind, Inc., Watertown, MA (US);
Abstract
A smart card capable of having a plurality of applications has a memory that is logically partitioned into a plurality of memory blocks. A control program allocates one or more blocks to one of the applications, upon a declaration from the application of its memory needs, and schedules the applications for execution. Only those applications whose memory needs have been satisfied are scheduled. The control program receives a permission request packet from a host, addressed to an application, and passes the permission request packet to the application. When the control program receives a permission packet from the addressed application after the addressed application has had its declared memory needs satisfied, the control program sends the permission packet to the host. A virtual machine is used to execute one or more of the applications. The control program communicates with the virtual machine to control scheduling to predetermined time granularity. A swapper swaps data pages between the smart card's memory, i.e., primary storage, and secondary storage in a host.