| 摘要 |
<p>The security device comprises an annular support (1) which is closed by a seal (2), and a non-volatile memory unit is connected to the support. A transponder (32) is connected to the memory element (31) for read out or altering piece of status information stored in the memory element. An electric or magnetic contact (21) enclosed by the seal is coupled to the memory element for changing the status information on opening or closing the contacts.</p> |
