Patents by Inventor Chen-Hsiung Chang

Chen-Hsiung Chang 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).

  • Publication number: 20220023935
    Abstract: A process for stamping metallic member with forging thickness of side walls, the process comprising: a forming step by forging, which forms the metallic member by forging; a step for forging thickness of the side walls, which extrudes the side walls of the metallic member to increase thickness of the metallic member; a specular treatment step with diamond cutter, which generates metallic texture of the side walls of the metallic member; and a finish step for forging thickness of the side walls of the metallic member. Wherein the metallic member, for example, is a sheet stamping component.
    Type: Application
    Filed: July 27, 2020
    Publication date: January 27, 2022
    Inventors: Wen-Hsing CHANG, Chen-Hsiung CHANG
  • Patent number: 4765003
    Abstract: A portable hands-free wash stand characterized by upper and lower foot pedals on its ladder-shaped bottom block for controlling water pump to pump up clean water to feed pipe for wash, and comprising a control switch for the selection of warm water and cool water, wherein waste water is collected in waste water storage tank; a low water level indicating lamp turns on when clean water of clean water storage tank been used up so as to advise people to move the present wash stand to a specific location for filling clean water and draining off waste water.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: August 23, 1988
    Inventor: Chen-Hsiung Chang
  • Patent number: D543904
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: June 5, 2007
    Inventor: Chen-Hsiung Chang