Identification card
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 19, 1985
Grant Date -
N/A
app pub date -
Nov 4, 1982
filing date -
Nov 5, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Identification card, including a card body, an integrated semiconductor circuit being mechanically inserted and protected in the card body for storing data to be read-out and read-in in changed form, a receiving antenna device, a rectifier circuit connected to the receiving antenna device, a filter circuit connected between the rectifier circuit and the integrated semiconductor circuit. The rectifier and filter circuits generate a supply voltage for the integrated semiconductor circuit from an energy field, a microwave transmitting antenna connected to the integrated semiconductor circuit, and a transmitter connected to the transmitting antenna.
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