Automatic vending equipment and credit purchase systems (US Patent 3995255)

Patent number: 3995255 Granted: 1976-11-30 Filed: 1975-10-20 Inventors: William E. Cuttill (Fenton, MI, US)

Abstract

The credit card is precoded in binary code representing several digits and has a locator indicator to insure that the card is correctly positioned when inserted in the console or read-out station. The card coding includes the method of arranging high dielectric constant spots or discs and low dielectric constant spots or discs in several groupings related to a plurality of identification digits.