Patents by Inventor Samuel Tsui Wai Keung

Samuel Tsui Wai Keung 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).

  • Toner cartridge for an image forming apparatus
    Publication number: 20040190937
    Abstract: A toner cartridge for use in a electrophotographic imaging machine comprises a photosensitive drum, process means acting upon the photosensitive drum and a rotating shaft which extends to the whole length of the drum along the drum's axis. A mounting component is provided which supports the photosensitive drum on the shaft, the mounting component producing electrical continuity between the inside surface of the photosensitive drum and the shaft.
    Type: Application
    Filed: January 5, 2004
    Publication date: September 30, 2004
    Inventors: Christopher Paul Mercer, Samuel Tsui Wai Keung