Patents by Inventor Ka Chai Wong

Ka Chai Wong 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).

  • Electrical device with a water-tight housing and method of making same
    Publication number: 20040075989
    Abstract: An electrical device including a main hollow housing inside which there are housed a plurality of electrical connections, the main housing includes at least a first and a second housing members which together form a hollow space for accommodating the connections, the first and second housing members being sealed and connected along their corresponding edges with a moulded layer of non-permeable thermoplastic material which is adhesive or bondable to the first and second housing of the main housing.
    Type: Application
    Filed: October 18, 2002
    Publication date: April 22, 2004
    Inventor: Ka Chai Wong