Patents by Inventor Michel J. E. Chretien

Michel J. E. Chretien 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).

  • Device for at least partly closing a vertical opening in a building and its use as a mechanical anti-freeze shutter
    Patent number: 4811777
    Abstract: A device for at least partially closing a vertical passage-way opening in a building by means of a continuous transversely stiff and longitudinally flexible curtain supported on each side by a curtain-carrying chain fitted with rollers riding in a corresponding lateral guideway, the chain being secured to the edge of the curtain and extending over at least the whole length thereof.
    Type: Grant
    Filed: July 8, 1987
    Date of Patent: March 14, 1989
    Assignee: MacGregor-Navire (F) S.A.
    Inventor: Michel J. E. Chretien