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:
Jul. 15, 2008
Filed:
Apr. 29, 2005
Ilkka Känsälä, Oulu, FI;
Heikki Huomo, Oulu, FI;
Ilkka Känsälä, Oulu, FI;
Heikki Huomo, Oulu, FI;
Nokia Corporation, Espoo, FI;
Abstract
A RF-ID tag, preferably passive, provides an event indicating the tag has been successfully interrogated by a reader for data transmission. The event may be voice, light, color, vibration, odor, or different combinations of event indicators. The tag includes an antenna linked to a micro processor and a memory. A non-linear device and for example a light emitting device (LED) are coupled to the microprocessor and memory as an indicator circuit. The reader transmits electromagnetic energy received by the tag antenna when within the reader transmission zone. The energy is sufficient for the tag to transmit data from the memory to the reader. As the tag is read by the reader, the data stream includes a few bytes at the end to indicate the reading was successful. The reader energy is also sufficient to cause the illumination of the LED providing a tag indication that a successful tag transmission has occurred.