04692604 is referenced by 70 patents and cites 5 patents.

Contactless inductive power transfer from a stationary "reader" to energize the electronics on a portable data or "smart" card is made practical through a flexible inductor carried on the card. The inductor, which acts as the secondary portion of a power transformer, comprises a flat coil and a flexible magnetic but nonmagnetostrictive core piece. The core piece may be a thin wafer of amorphous magnetic alloy. Clock pulses to synchronize data transfer on the card with the reader can also be generated from the signal picked up by the inductor.

Title
Flexible inductor
Application Number
6/664555
Publication Number
4692604
Application Date
October 25, 1984
Publication Date
September 8, 1987
Inventor
Robert L Billings
Andover
MA, US
Agent
Joseph A Cameron
Assignee
American Telephone and Telegraph Company AT&T Bell Laboratories
NJ, US
IPC
G06K 19/06
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