Patents by Inventor Marcus Steffen

Marcus Steffen 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).

  • Large-area washer having friction increasing elements on the underside thereof
    Patent number: 5915903
    Abstract: In a large-area washer (1) there is an aperture for the insertion of a fastener and a bead (16) to stiffen the washer (1). To provide better engagement with a plate and/or web to be fastened, there are engagement components (13) on the underside of the washer (1) which are pressed out of the whole material of the washer (1) and project approximately perpendicularly downwards from it. The engagement components (13) are conical or truncated cones.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: June 29, 1999
    Assignee: SFS Industrie Holding AG
    Inventors: Helmut Osterle, Stefan Baumgartner, Marcus Steffen