Patents by Inventor Hark C. Chan

Hark C. Chan 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: 6188869
    Abstract: An information distribution and processing system has a broadcast channel for delivering a first set of digital data and a bi-directional channel for allowing a user to obtain additional information. The additional information is stored in a database. In one embodiment of the present invention, the broadcast channel uses a satellite to broadcast the data. In another embodiment of the invention, the bidirectional channel is a telephone system. At predetermined locations of the first set of digital data, linking references are embedded. If desired, the user can select a linking reference and send a request to the database via the bidirectional channel. The database uses the selected linking reference to search for information, and returns the requested information to the user.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: February 13, 2001
    Inventor: Hark C. Chan
  • Patent number: 6021307
    Abstract: An information distribution and processing system has a broadcast channel for delivering a first set of digital data and a bi-directional channel for allowing a user to obtain additional information. The additional information is stored in a database. In one embodiment of the present invention, the broadcast channel uses a satellite to broadcast the data. In another embodiment of the invention, the bi-directional channel is a telephone system. At predetermined locations of the first set of digital data, linking references are embedded. If desired, the user can select a linking reference and send a request to the database via the bi-directional channel. The database uses the selected linking reference to search for information, and returns the requested information to the user.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: February 1, 2000
    Inventor: Hark C. Chan