Patents by Inventor Douglas G. Ellson

Douglas G. Ellson 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).

  • Clamp for concrete forms
    Patent number: 3933333
    Abstract: Disclosed is a clamp or tie rod assembly which can be inserted and withdrawn from one side of spaced form members between which concrete or the like is to be poured. The assembly includes a removable shaft and an eccentrically bored spacer accommodated on the shaft prior to its insertion between the forms. The spacer is left imbedded in the concrete when the shaft is later withdrawn at the time the forms are to be removed from the concrete.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: January 20, 1976
    Inventor: Douglas G. Ellson