Patents by Inventor Chwee Guan Koh

Chwee Guan Koh 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: 6692284
    Abstract: An improved electrical socket includes a plurality of socket apertures to receive the pins of plugs. The socket apertures can receive the pins of plugs of various designs from many countries of the world. There is a plastic cover to prevent access to the internal electrical contacts when the plug is not inserted, and the plastic cover holds the plug in position when it is inserted. The electrical socket comprises a face plate connected to a socket bracket. The socket bracket has a 3-pole connector to receive wiring from the main supply, and the faceplate has corresponding 3-pole pins for mating connection with the 3-pole connector when the face plate is attached to the socket bracket for easily change of the face plate. A circuit breaker on the electrical socket prevents damage to an appliance attached to the socket due to current leakage or shock current, and the user is warned when there is a heat overload. An improved electrical plug is also described.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: February 17, 2004
    Assignee: NNB Electronic Technology Pte. Ltd.
    Inventor: Chwee Guan Koh