Patents by Inventor Changfu Luo

Changfu Luo 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).

  • Sink filter device
    Patent number: D725751
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: March 31, 2015
    Assignee: Taizhou Luobang Sanitary Ware Mfg Co., Ltd.
    Inventor: Changfu Luo
  • Sink filter device
    Patent number: D728077
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: April 28, 2015
    Assignee: Taizhou Luobang Sanitary Ware Mfg Co., Ltd.
    Inventor: Changfu Luo
  • Sink filter device (3)
    Patent number: D745642
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: December 15, 2015
    Assignee: TAIZHOU LUOBANG SANITARY WARE MFG CO., LTD.
    Inventor: Changfu Luo
  • Sink filter device
    Patent number: D919771
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: May 18, 2021
    Assignee: TAIZHOU LUOBANG SANITARY WARE MFG CO., LTD.
    Inventor: Changfu Luo
  • Sink filter device
    Patent number: D919772
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 18, 2021
    Assignee: TAIZHOU LUOBANG SANITARY WARE MFG CO., LTD.
    Inventor: Changfu Luo
  • Sink filter device
    Patent number: D919773
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 18, 2021
    Assignee: TAIZHOU LUOBANG SANITARY WARE MFG CO, LTD.
    Inventor: Changfu Luo
  • Sink filter device
    Patent number: D935571
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: November 9, 2021
    Assignee: TAIZHOU LUOBANG SANITARY WARE MFG CO., LTD.
    Inventor: Changfu Luo