| 摘要 |
<p>The invention relates to a card (10), such as an access or credit card, with a coded pattern of projections and/or recesses (13, 14) extending out of the plane of the card (10) which can be inserted into a lock. Any suitable receipt means, such as a shaped insertion plate (20) may be used to preclude initial entry of any card (10) not having the necessary profile, the card otherwise operating normally.</p> |
