Patents by Inventor Lou Dafu

Lou Dafu 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).

  • Security access device and method
    Patent number: 9454657
    Abstract: A security system and method is provided. An embodiment includes a security access device that includes a first transmitter for transmitting authentication to a computer and a second transmitter for transmitting verification information to a computer. The first transmitter is typically active and consumes power from the access device, while the second transmitter is typically passive, and consumes less or nil power from the access device. When the security access device is initially brought proximal to the computer and activated, the authentication information is sent to the computer and the user is logged in. Periodically, the computer will query the passive transmitter for verification information, to ensure that the security access device is still proximal to the computer.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: September 27, 2016
    Assignee: BCE Inc.
    Inventors: Tet Hin Yeap, Lou Dafu, William G. O'Brien
  • Security access device and method
    Publication number: 20060123463
    Abstract: A security system and method is provided. An embodiment includes a security access device that includes a first transmitter for transmitting authentication to a computer and a second transmitter for transmitting verification information to a computer. The first transmitter is typically active and consumes power from the access device, while the second transmitter is typically passive, and consumes less or nil power from the access device. When the security access device is initially brought proximal to the computer and activated, the authentication information is sent to the computer and the user is logged in. Periodically, the computer will query the passive transmitter for verification information, to ensure that the security access device is still proximal to the computer.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 8, 2006
    Inventors: Tet Yeap, Lou Dafu, William O'Brien