Patents by Inventor Istvan Dombi

Istvan Dombi 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).

  • Railway roadbeds with rail slabs, and method for preparing
    Patent number: 5163614
    Abstract: A railroad bed and method for making, wherein a less compact asphalt layer is spread on top of a more compact one, a trough shaped ballast bedding element suitably of reinforced concrete is placed over the aforementioned asphalt layers, a slab bearing the rails is applied into the trough-shaped ballast bedding, and an elastic, plastic-modified bituminous mortar is injected into the space between the slab and the ballast bedding element.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: November 17, 1992
    Assignee: Beton-es Vasbetonipari Muvek
    Inventors: Laszlo Tamas, Zsolt Paapenek, Attila Komaromy, Istvan Varszegi, Antal Tapai, Jozaef Kokai, Adrian Horvath, Laszlo Farkas, Jeno Fulop, Andras Piller, Istvan Dombi