Patents by Inventor Yiu T. Liu

Yiu T. Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5440108
    Abstract: A cash card dispensing and revaluing system having payment apparatus for receiving and validating payment operating in conjunction with a cash card dispensing assembly for storing a number of cash cards and for dispensing a cash card upon consumer request and payment of a predetermined payment amount. Additionally including in the system a cash card revaluing assembly for revaluing a cash card upon insertion of the card into the revaluing assembly in conjunction with insertion of payment into the payment apparatus. The payment apparatus includes currency accepting and validating systems such as bill validators or, alternatively, credit and debit card validators.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: August 8, 1995
    Assignee: Verifone, Inc.
    Inventors: Dich C. Tran, Yiu T. Liu, Stanley Y. W. Lui, Joseph Y. Kwong, Junqi Yan
  • Patent number: 5434404
    Abstract: Apparatus for scanning a data card which comprises a thin, flexible medium having leading and trailing edges and one or more data stripes formed thereon at a prearranged location and extending transverse to said leading and trailing edges. The apparatus comprises a card guide for defining a linear card guide path and an entrance slit for accepting the data card into the guide path. A card positioning assembly is cooperatively associated with the card guide and drives the data card through the entrance slit and into the card guide. The card positioning assembly positions the card in a stationary prearranged location. A transducer positioning assembly linearly scans transducers along the data stripes on the data card.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: July 18, 1995
    Assignee: Verifone, Inc.
    Inventors: Yiu T. Liu, Lang V. Nguyen, Joseph Y. Kwong, Stanley Y. W. Lui