Patents by Inventor Richard Arfsten

Richard Arfsten 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).

  • Roof ventilator
    Patent number: 4520713
    Abstract: A ventilator for mounting on a sloping roof has a pair of trapezoidal side members. The uphill ends of the side members are less slanted than the lower ends. Covering members extend between the side members to define an opening along the upper bases of the side members through which air may exit from a hole in the roof of the building.
    Type: Grant
    Filed: March 24, 1983
    Date of Patent: June 4, 1985
    Inventor: Richard Arfsten