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. 10, 2003
Filed:
Dec. 06, 1999
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A remote-controlled access control device includes a stationary transceiver device with a triggering device and a portable transponder. The stationary transceiver device transmits an interrogation code signal in response to the triggering device being activated. The portable transponder receives the interrogation code signal and has a manually activatable activation element. The portable transponder generates a code signal and transmits, together with the code signal, information indicating whether the code signal is generated in response to the interrogation code signal or in response to the activation element being activated. The stationary transceiver device receives the information together with the code signal and generates an unlocking signal based on an evaluation of the code signal with the information indicating whether the code signal is generated in response to the interrogation code signal or in response to the activation element being activated.