Patents by Inventor Markku S. Lehtonen

Markku S. Lehtonen 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: 5006006
    Abstract: A connector for connecting wooden beams to one another, in which the capacities of a conventional toothed plate to transfer tensile and compressive forces have been improved by securing one or several toothed plates (3, 4, 5) to a mutual frame plate (2).
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: April 9, 1991
    Assignee: Metsa-Serla Oy
    Inventor: Markku S. Lehtonen
  • Patent number: 4891927
    Abstract: A joint in which wooden beams are made up of beam members, located side by side in the longitudinal direction of the beams, and in which beam joint elements, provided with nails, are fitted on the inner surfaces of the beam members in such a way that they do not extend all the way to the outer surface of the beams. The joint may be used in trust structures.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: January 9, 1990
    Assignee: Metsaliiton Teollisuus OY
    Inventors: Matti O. Kairi, Markku S. Lehtonen