The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 1978
Filed:
Dec. 03, 1976
David D Thornburg, Los Altos, CA (US);
Roy J Lahr, Fairfield, CT (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A consumable credit card is provided which comprises a recording device that is adapted to receive progressively advancing recording up to a limit at which time the card is consumed and thereafter is discarded. The card is adapted to be inserted into a reader which accepts, reads and advances the indication on the credit card or reading to indicate an additional use until the credit card is expended and the reader no longer allows the item or service to be dispensed because the credit card has been expended. This credit card employs tapered resistor technology in order to store a permanent record of expended credit and advance same upon energization of the tapered resistor element residing in the device. Methods of employing this device in billing systems are also disclosed.