Patents by Inventor Hei Ming Tsang

Hei Ming Tsang 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).

  • System and method for using RSSI to invoke features of a wireless device
    Patent number: 7289801
    Abstract: A system and method for invoking one or more features of a wireless device when a signal strength of a channel approaches or drops below an RSSI threshold of the channel is disclosed. An embodiment of the invention includes the steps of (1) obtaining the RSSI threshold for the channel; (2) monitoring the signal strength during an operation mode of the wireless device; and (3) invoking the feature when the signal strength approaches a predetermined limit of the RSSI threshold. In an implementation on a cordless telephone, the feature can include playing a warning, switching to a different channel, or returning a telephone line to an idle state.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: October 30, 2007
    Assignee: VTech Telecommunications Limited
    Inventors: Chi Fai Chan, Hei Ming Tsang, Wai-Hung Leung
  • System and method for using RSSI to invoke features of a wireless device
    Publication number: 20040203700
    Abstract: A system and method for invoking one or more features of a wireless device when a signal strength of a channel approaches or drops below an RSSI threshold of the channel is disclosed. An embodiment of the invention includes the steps of (1) obtaining the RSSI threshold for the channel; (2) monitoring the signal strength during an operation mode of the wireless device; and (3) invoking the feature when the signal strength approaches a predetermined limit of the RSSI threshold. In an implementation on a cordless telephone, the feature can include playing a warning, switching to a different channel, or returning a telephone line to an idle state.
    Type: Application
    Filed: January 8, 2003
    Publication date: October 14, 2004
    Inventors: Chi Fai Chan, Hei Ming Tsang, Wai-Hung Leung