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:
Feb. 03, 2004
Filed:
Sep. 19, 2000
Marc Degrauwe, Chez-le-Bart, CH;
Gilles Cérède, Neuchâtel, CH;
Thierry Roz, Prêles, CH;
EM Microelectronic-Marin SA, Marin, CH;
Abstract
Transponder ( ) associated with a communication system for various different applications having different security levels. This transponder includes means ( , R) allowing the maximum communication distance between the transponder and a reader ( ) to be varied as a function of the application selected or activated. A code, which determines the opening or closing of the switch ( ) is associated with each application. In a first group of embodiments, the equivalent impedance of the electronic unit associated with the antenna ( ) is varied, whereas in another embodiment, the electric characteristics of the antenna itself are varied.