Patents by Inventor Guofa Shao

Guofa Shao 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).

  • Spin dry mop
    Patent number: 8316502
    Abstract: A spin dry mop includes an outer tube and a handle fitting over the outer tube. The handle is made of a different material than the outer tube. The inner tube is sized to fit telescopically within the outer tube. A fastness key is bonded to the handle and fits inside the outer tube. A corkscrew screw is made of a strip of flat metal having a plurality of turns. The fastness key is made of a different material than the corkscrew screw. The fastness key is bonded to the handle at a key top end and bonded to the corkscrew screw at a key lower end. A screw tube has a keyed opening with an internal profile of the corkscrew screw and receives the corkscrew screw within the keyed opening.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: November 27, 2012
    Inventor: Guofa Shao
  • Spin Dry Mop
    Publication number: 20120174335
    Abstract: A spin dry mop includes an outer tube and a handle fitting over the outer tube. The handle is made of a different material than the outer tube. The inner tube is sized to fit telescopically within the outer tube. A fastness key is bonded to the handle and fits inside the outer tube. A corkscrew screw is made of a strip of flat metal having a plurality of turns. The fastness key is made of a different material than the corkscrew screw. The fastness key is bonded to the handle at a key top end and bonded to the corkscrew screw at a key lower end. A screw tube has a keyed opening with an internal profile of the corkscrew screw and receives the corkscrew screw within the keyed opening.
    Type: Application
    Filed: January 11, 2011
    Publication date: July 12, 2012
    Inventor: Guofa Shao
  • Spin mop bucket
    Patent number: D693080
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: November 5, 2013
    Inventor: Guofa Shao