Circular Hood Patents (Class D23/376)
  • Ventilation rotor
    Patent number: D471624
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: March 11, 2003
    Assignee: Flettner Ventilator Limited
    Inventors: Christopher John Hurlstone, Mark Anthony Di Cioccio, Reuben Wu, Sophie Rebecca Butler, Robert Cheetham Halstead, Alan Peter Tye, Kevin Alan Alex Tye
  • Solar powered roof vent fan
    Patent number: D310874
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: September 25, 1990
    Inventor: James E. Utley, Jr.
  • Exhaust fan
    Patent number: D984627
    Type: Grant
    Filed: February 8, 2023
    Date of Patent: April 25, 2023
    Inventor: Wei Huang