Patents by Inventor Marcel Beirens

Marcel Beirens 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).

  • Modular nesting metal conduit, in particular for discharging fumes
    Patent number: 6113155
    Abstract: An interfitting modular metal duct made up of elements forming an inner d, pairs of elements being united by respective collars, sealing between the two elements being provided by a lip gasket and a fold chamber mounted in the female end of an element and bearing against the outside surface of the corresponding male portion.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: September 5, 2000
    Assignee: Constructions Metalliques Mecaniques Beirens C.M.M. Beirens, SA
    Inventor: Marcel Beirens