Patents by Inventor Mathilde Krippner

Mathilde Krippner 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).

  • Head for passages, door and window openings
    Patent number: 4389822
    Abstract: The invention provides a novel beam for covering wall openings in order to facilitate constructional work at building sites. For this purpose a prefabricated beam consisting of one piece is suggested, which without any additional scaffolds being required may be placed over a wall opening as one unit.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: June 28, 1983
    Inventor: Mathilde Krippner