Patents by Inventor Ngai Kwok Hing Pilcher

Ngai Kwok Hing Pilcher 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).

  • Systems and methods for an electronic hook switch for customer premises equipment
    Patent number: 7864948
    Abstract: Embodiments of the present invention relate to systems and methods for an electronic hook switch for customer premises equipment. In an embodiment, a system includes a first lead configured to be coupled to a tip wire and a second lead and the second lead to a ring wire. A diode bridge is coupled to the first lead and the second lead had a positive output. A low side switch is coupled to the positive output of the diode bridge without a high side switch between the low side switch and the positive output of the diode bridge.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: January 4, 2011
    Assignee: VTech Telecommunications Limited
    Inventors: Ngai Kwok Hing Pilcher, Wai-Hung Leung
  • Systems and methods for an electronic hook switch for customer premises equipment
    Patent number: 7103175
    Abstract: Embodiments of the present invention relate to systems and methods for an electronic hook switch for customer premises equipment. In an embodiment, a system includes a first lead configured to be coupled to a tip wire and a second lead configured to be coupled to a ring wire. A diode bridge is coupled to the first lead and the second lead and has a positive output. A low side switch is coupled to the positive output of the diode bridge without a high side switch between the low side switch and the positive output of the diode bridge.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: September 5, 2006
    Assignee: VTech Telecommunications Limited
    Inventors: Ngai Kwok Hing Pilcher, Wai-Hung Leung
  • Systems and methods for an electronic hook switch for customer premises equipment
    Publication number: 20040131176
    Abstract: Embodiments of the present invention relate to systems and methods for an electronic hook switch for customer premises equipment. In an embodiment, a system includes a first lead configured to be coupled to a tip wire and a second lead configured to be coupled to a ring wire. A diode bridge is coupled to the first lead and the second lead and has a positive output. A low side switch is coupled to the positive output of the diode bridge without a high side switch between the low side switch and the positive output of the diode bridge.
    Type: Application
    Filed: March 28, 2003
    Publication date: July 8, 2004
    Inventors: Ngai Kwok Hing Pilcher, Wai-Hung Leung