Patents by Inventor Chi Wai Chu

Chi Wai Chu 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: 5142564
    Abstract: A telephone answering machine for receiving and recording calls received over telephone lines includes one of a plurality of interchangeable base units having different functions and features, one of a plurality of interchangeable user-interface units also having different functions and features, and a system for communicating between the units. Each base unit includes a telephone line interface circuit, a player/recorder and a first controller, responsive to commands for operating the base unit devices. Each installed user-interface unit is remote from an associated installed base unit and includes user-operable key means for inputting command signals related to the recording and playing back of messages. It also includes a speaker, a microphone, a display for visually displaying information, and a second controller for controlling operation of the keys, speaker, and display. The communication system uses a standard interface for coupling any base unit to any user-interface unit.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: August 25, 1992
    Inventor: Chi Wai Chu
  • Patent number: 4930019
    Abstract: A video cassette recorder plays an audio/video tape prerecorded with a video signal, three voice signals and three audio control signals. One of the voice signals is modulated with a carrier higher in frequency than the other voice signals for recording. The video image is displayed on a television monitor. The audio signals are coupled to a control unit which broadcasts one of the voice signals and transmits the other two with associated control signals to remotely located dolls. The dolls broadcast the voice signals according to the corresponding control signals. Hand-held switch units allow individuals to preempt broadcasting by the dolls to permit the individuals to interject their own vocal responses.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: May 29, 1990
    Inventor: Chi Wai Chu