Patents by Inventor Zhaozhan Wu

Zhaozhan Wu 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).

  • Middle rod structure of automatic umbrella, umbrella frame, and automatic umbrella
    Patent number: 10813426
    Abstract: Provided is an automatic umbrella. The middle rod structure comprises an outer sleeve; a movable sleeve; a first elastic element; a locating element; an adjustment element; and a long rod comprising a long rod upper end and a long rod lower end; wherein the long rod upper end is abutted against the adjustment element, and the long rod lower end is located inside the movable sleeve for limiting the first elastic element from moving along a direction perpendicular to the longitudinal direction.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: October 27, 2020
    Inventor: Zhaozhan Wu
  • MIDDLE ROD STRUCTURE OF AUTOMATIC UMBRELLA, UMBRELLA FRAME, AND AUTOMATIC UMBRELLA
    Publication number: 20200054105
    Abstract: Provided is an automatic umbrella. The middle rod structure comprises an outer sleeve; a movable sleeve; a first elastic element; a locating element; an adjustment element; and a long rod comprising a long rod upper end and a long rod lower end; wherein the long rod upper end is abutted against the adjustment element, and the long rod lower end is located inside the movable sleeve for limiting the first elastic element from moving along a direction perpendicular to the longitudinal direction.
    Type: Application
    Filed: December 17, 2018
    Publication date: February 20, 2020
    Inventor: Zhaozhan Wu