04809837 is referenced by 80 patents and cites 12 patents.

This gift certificate has information recorded thereon for identifying a total face value vendible by the gift certificate and a predetermined base amount equal to or smaller than the total face value. The information recorded on a deposited gift certificate is read by a reading device. A validation device validates the total face value and the base amount of the deposited gift certificate in response to the read information. A vending permission judgement device prohibits, in reponse to an output of the validation device, at least vending of an article to which a vend price below the base amount has been assigned. By virtue of this arrangement, a purchaser of an article from a vending machine by using a gift certificate is not forced to make purchase of the entire total face value but has only to make purchase above the base amount in which case a change preferably is paid out.

Title
Control device for a vending machine and gift certificate for use thereon
Application Number
721573
Publication Number
4809837
Application Date
February 26, 1987
Publication Date
March 7, 1989
Inventor
Yukichi Hayashi
Sakado
JP
Agent
Spensley Horn Jubas & Lubitz
Assignee
Kabushiki Kaisha Nippon Coinco
JP
IPC
G07F 7/02
View Original Source