Patents by Inventor Siu Hung CHEUNG

Siu Hung CHEUNG 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).

  • Roller blind device
    Patent number: 8418741
    Abstract: The present invention relates to a roller blind device, which comprises a special curtain. The roller blind device also comprises a first circular tube for fixing the upper end of the special curtain and a second circular tube for fixing the lower end of the special curtain. A torsion spiral which is capable of rolling up the special curtain and a stop means for lifting the second circular tube are arranged in the second circular tube. Such structure ensures that the roller blind device can roll up a plurality of roller blind curtains or show one of the plurality of roller blind curtains.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: April 16, 2013
    Inventor: Siu Hung Cheung
  • Roller Blind Device
    Publication number: 20120031568
    Abstract: The present invention relates to a roller blind device, which comprises a special curtain. The roller blind device also comprises a first circular tube for fixing the upper end of the special curtain and a second circular tube for fixing the lower end of the special curtain. A torsion spiral which is capable of rolling up the special curtain and a stop means for lifting the second circular tube are arranged in the second circular tube. Such structure ensures that the roller blind device can roll up a plurality of roller blind curtains or show one of the plurality of roller blind curtains.
    Type: Application
    Filed: August 4, 2011
    Publication date: February 9, 2012
    Inventor: Siu Hung CHEUNG