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:
Jun. 06, 2000
Filed:
Sep. 23, 1997
Applicant:
Inventor:
Albertus Feiken, Amstelveen, NL;
Assignee:
Koninklijke KPN N.V., Groningen, NL;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
235380 ; 235375 ; 235384 ; 235383 ; 235492 ; 902-1 ; 902 13 ; 902 21 ; 902 22 ;
Abstract
A method of recovering and thus possibly completing interrupted smart card transactions includes providing a smart card that stores a first and a second pointer, the second pointer being used to indicate an update of the first pointer. In the case of an interruption of a smart card transaction, these pointers are be used to indicate whether a change of a card balance has taken place by the equality of the values of these pointers.