Patents by Inventor John Du(aka. Xiaoqiang Du)

John Du(aka. Xiaoqiang Du) 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: 20030143922
    Abstract: A multi-purpose projecting device for propelling and disseminating, generally vertically, paper disks, confetti, or fluid contained in a cartridge. Contents of the cartridge as well as the outside surface of the launching tube may be covered with a fluorescent material. The launching tube may serve as a flagpole to supplement its primary function at large social gatherings such as sporting or music events, wedding ceremonies, holiday celebrations, etc. The device consists of a two-part cylindrical launching apparatus and a cylindrical cartridge that may hold paper disks, confetti, fluid, or other soft materials such as fiber, string, fabric, etc. The upper section of the launching tube folds back, into which the cartridge can then be inserted. The lower section of the launching tube consists of a spring, a plunger, a spring, a string, and a trigger. After the cartridge is loaded, a string connecting to the plunger is pulled, contracting the spring and setting the trigger ready for launching.
    Type: Application
    Filed: May 30, 2002
    Publication date: July 31, 2003
    Inventor: John Du(aka. Xiaoqiang Du)