| 摘要 |
<p>1536372 Card validation systems NCR CORP 26 July 1977 [2 Aug 1976] 31286/77 Heading G4H A data sensing system for determining the validity of a record member (e.g. credit or I.D. card) performs a predetermined mathematical operation utilizing first and second data sensed from the member and compares the result with third data sensed from the member, a first sensing device being used to sense the first and third data and a second sensing device being used to sense the second data.</p> |
