Patents by Inventor Mads Gjerdrum

Mads Gjerdrum 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: 5257449
    Abstract: A method and an apparatus is described for fastening buttons to a textile fabric or the like, with the fastening threads (1) being collected to form a thin bundle beneath said button before said bundle is forced through the fabric (7), so that after the button (2) is fastened it will sit at a certain distance from the fabric with a thin bundle of threads in the middle. Collection of the fastening threads (1) is achieved by threading them into a standard button (2) and providing the button in holding means (3) of the apparatus, thus, to clamp the threads together by movement of clamping means (4). When the fabric (7) is in place the holding means (3) of the apparatus is urged down towards the contact plate and the collected bundle of fastening threads is forced through the fabric (7), down into the contact plate and is forced around, out and up through the fabric again and in towards its own axis. The apparatus is removed and the button is fastened.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: November 2, 1993
    Inventor: Mads Gjerdrum
  • Patent number: 4168093
    Abstract: A construction for a non-powered trailer to be towed by a motor vehicle is disclosed. A trailer frame is provided to which a plurality of different bodies can be affixed. In addition, the trailer is adaptable to be readily stored in a vertical position whereby storage space is substantially reduced.
    Type: Grant
    Filed: October 28, 1977
    Date of Patent: September 18, 1979
    Assignee: Elkem-Spigerverket A/S
    Inventors: Sven I. Dysthe, Mads Gjerdrum