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    RADIATION INDICATOR DEVICE
    86.
    发明专利
    RADIATION INDICATOR DEVICE 未知

    公开(公告)号：CA2282084A1

    公开(公告)日：2001-03-10

    申请号：CA2282084

    申请日：1999-09-10

    Applicant: JACKSON STUART A ,  HUDDA KARIMA ,  ATRAZHEVA ELENA ,  MERCER JOHN R ,  WANG SANYI

    Inventor： JACKSON STUART A ,  HUDDA KARIMA ,  ATRAZHEVA ELENA ,  MERCER JOHN R ,  WANG SANYI

    IPC: G01J1/50

    Abstract: A radiation indicator device for use in indicating exposure to ultraviolet -B radiation. The device includes a radiation sensitive mixture which is selectively responsive to ultraviolet radiation having a wavelength substantially within or shorter than the range of wavelengths of ultraviolet-B radiation. The radiation sensitive mixture includes an organic halogen constituent capable of producing at leas t one acidic product upon exposure to ultraviolet radiation and an indicator constituent capable of producing a change in colour in response to a change in concentration of the acidic product. The radiation sensitive mixture has a first colour representing a relatively low concentration of the acidic product and has a second colour representing a relatively high concentration of the acidic product. The first colour is visually distinguishable from the second colour. The device may also include a graphic pattern interposed amongst the radiation sensitive mixture, which graphic pattern has a graphic pattern colour substantially identical to either the first colour or the second colour.

    Secure flexible prepaid card system and method
    89.
    发明专利
    Secure flexible prepaid card system and method 未知

    公开(公告)号：AU3242600A

    公开(公告)日：2000-09-14

    申请号：AU3242600

    申请日：2000-02-23

    Applicant: STUART A FOX

    Inventor： FOX STUART A

    IPC: G06Q20/00 ,  G07F7/02 ,  G07F7/08 ,  G06F7/12 ,  A63F9/24

    Abstract: A system and method for securely and flexibly handling prepaid card transactions in a single store, chain of stores, or multiple independent stores or chains of stores. Point of sale terminals are programmed to read prepaid cards and contact a host computer that autorizes transactions. The host computer (6) accesses a database containing a list of all clerks authorized to use each terminal. In a preferred embodiment, three types of terminals are provided: activation terminals (3) that permit value to be added to prepaid card, clerk terminals (4) that permit value to be redeemed from, but not added to, prepaid cards, and manager terminals (2) that are capable of adding or deleting a clerk from the list of clerks authorized to use a terminal. The system also permits a merchant or customer service provider to directly access the data base from a computer in a secure restricted manner.

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