Patents by Inventor Sten B. Burwall

Sten B. Burwall 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).

  • Patent number: 4189247
    Abstract: A connector for connecting together the structural members of frame works comprises two identical halves having means for receiving respective ends of said members. The two halves of the connector pivotably coupled together to permit the halves to be pivoted between a first position in which the structural members are arranged at a first angle and a second position in which the structural members are arranged at a second angle. In each of the first and second positions, a mouth is provided for receiving a third structural member. The advantage afforded by the present invention is that a single connector may be employed to position different frame members at selected angles therebetween.
    Type: Grant
    Filed: July 20, 1978
    Date of Patent: February 19, 1980
    Inventor: Sten B. Burwall