05834756 is referenced by 313 patents and cites 33 patents.

A magnetically communicative card (200) has a ferrite core (302) extending substantially the length of the card body (203) and has a conductor (408) wound around the ferrite core for the entire length of the ferrite core. Embedded within the card body is a controller (208) that controls a varying magnetic field emanating from the conductor to mimic a varying magnetic field produced by a conventional magnetic stripe card. Optionally, the card includes a sensor to sense a sensed signal picked up by the conductor from a varying magnetic field emanating from another device. The controller can read the sensed signal to receive communication from the other device. A magnetically communicative card (400, 500) is alternatively flexibly attached and detachably coupled to an electronic wallet (402, 502) to produce an apparatus (405, 501). A wireless communication interface (523) is alternatively carried by the magnetically communicative card and the electronic wallet to provide wireless reconfiguration of the magnetically communicative card remotely.

Title
Magnetically communicative card
Application Number
8/657144
Publication Number
5834756
Application Date
June 3, 1996
Publication Date
November 10, 1998
Inventor
Michael J DeLuca
Boca Raton
FL, US
Jose Gutman
Boynton Beach
FL, US
Assignee
Motorola
IL, US
IPC
G06K 5/00
G06K 19/06
View Original Source