Patents by Inventor Daniel Duyck

Daniel Duyck 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).

  • Composite road safety slip rails made from metal and reinforced wood
    Patent number: 5402987
    Abstract: Composite slip rails for road safety made from round wooden bars reinforced with iron and comprising posts made from sectional iron and supporting each one a spacer carrying a horizontal guard rail consisting of previously slotted round wooden beams reinforced with embedded metal fishplates providing for the cohesion of the wood and the connection of the elements.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: April 4, 1995
    Inventors: Daniel Duyck, Jacques de Maussion