Prepaid telephone calling card with distinct PIN numbers

Details Prepaid telephone calling card with distinct PIN numbers Prepaid telephone calling card with distinct PIN numbers

2008-07-15

2008-07-15

Tieu, Binh K (Department: 2614)

Telephonic communications

With usage measurement

Call charge metering or monitoring

C379S114200, C379S144010, C235S074000, C235S380000, C428S042300, C428S043000, C040S674000

Reexamination Certificate

active

10711772

ABSTRACT:
A prepaid long-distance telephone calling card has two or more distinct PIN numbers each obscured by opaque scratch-off material. Each PIN number is associated with prepaid value. A user can scratch off the opaque material for PIN numbers one by one, and the value for each PIN number expires in a way that is unrelated to any other PIN number on the card.

REFERENCES:
patent: 7290703 (2007-11-01), Jacobs
patent: 2002/0088851 (2002-07-01), Hodes
patent: 2004/0120475 (2004-06-01), Bauer et al.
patent: 2004/0139318 (2004-07-01), Fiala et al.
patent: 2005/0008132 (2005-01-01), Paschini et al.
patent: 2005/0116028 (2005-06-01), Cohen et al.
patent: 2005/0123112 (2005-06-01), New et al.

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