Credit card security system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 17, 1987
Grant Date -
N/A
app pub date -
Feb 11, 1985
filing date -
Feb 11, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A credit card and charge slip are provided which resist credit card fraud. The credit card has auxiliary characters and corresponding dates at which each should be used, the auxiliary characters not being embossed at a copy area as are the numbers of the credit card. A merchant finalizes a credit card purchase by writing the auxiliary character only on the bank copy of the credit slip. The credit slip can be formed with aligned holes in all of the sheets except the bank sheet, so a merchant can write the auxiliary character directly on the bank sheet without even partially separating the sheet.
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