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. 11, 2001
Filed:
Oct. 28, 1999
Jean-Marie Gaultier, Rousset, FR;
STMicroelectronics S.A., Gentilly, FR;
Abstract
A method is provided for identifying electronic cards. According to the method, an interrogation message is sent to the electronic cards, and at least two different types of markers are sent to the electronic cards. The markers of the first type determine the time slots in the sequence, and the markers of the second type cause the electronic cards to change to predetermined states. In a preferred method, the identification method is interrupted when a marker of the second type is sent. Also provided is a method of identifying electronic cards by receiving an interrogation message from an interrogation unit, and at least two different types of markers are received from the interrogation unit. The markers of the first type determine the time slots in the sequence, and the markers of the second type cause the electronic cards to change to predetermined states. Additionally, communication systems of the type in which an interrogation unit identifies electronic cards are provided.