Patents by Inventor Albrecht Graefer

Albrecht Graefer 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).

  • Nonskid box studs
    Patent number: 4545421
    Abstract: A plurality of supporting elements for providing a separation between adjacent casting molds are interconnected by a web or band. The interconnecting element allows the supporting elements to be easily placed on a mold surface, and requires securing only selected ones of the supporting elements to the mold surface. The remainder of the supporting elements are held in place by the action of the interconnecting element.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: October 8, 1985
    Assignee: Karl Schmidt Fabrik fur Giessereibedarf GmbH & Co.
    Inventors: Wolfgang Baetz, Albrecht Graefer, Edgar Low