Patents by Inventor Wen-hsiung Adam Tseng

Wen-hsiung Adam Tseng 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).

  • Method of detecting waste toner in a container of an image forming apparatus
    Patent number: 6580881
    Abstract: Waste toner is detected in a container of an image forming apparatus. An auger is provided within the container. A switch is provided which is operable depending upon a torque associated with operation of the auger. A frequency of activation of the switch is detected. A “not full”, “near full” and “full” condition of the waste toner in the container is determined depending upon the frequency of activation of the switch.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: June 17, 2003
    Assignee: Lexmark International, Inc.
    Inventors: Matthew Christopher Coriale, Jonathan Carey Frey, Harald Portig, John Parker Richey, Wen-hsiung Adam Tseng, Liqun Larry Wang
  • METHOD OF DETECTING WASTE TONER IN A CONTAINER OF AN IMAGE FORMING APPARATUS
    Publication number: 20030068167
    Abstract: Waste toner is detected in a container of an image forming apparatus. An auger is provided within the container. A switch is provided which is operable depending upon a torque associated with operation of the auger. A frequency of activation of the switch is detected. A “not full”, “near full” and “full” condition of the waste toner in the container is determined depending upon the frequency of activation of the switch.
    Type: Application
    Filed: October 4, 2001
    Publication date: April 10, 2003
    Inventors: Matthew Christopher Coriale, Jonathan Carey Frey, Harald Portig, John Parker Richey, Wen-Hsiung Adam Tseng, Liqun Larry Wang