Patents by Inventor Franciscus Cornelis Gerardus Lamers

Franciscus Cornelis Gerardus Lamers 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).

  • Retractable window covering having a length expanding stiffening rod
    Patent number: 7631682
    Abstract: A retractable window covering that has a flexible fabric panel having a bottom edge with a weight bar attached to it. The fabric panel has one or more elongate pockets across its width, accommodating a length-expanding stiffening rod with: an elongate guiding element of non-magnetic material; a first magnet guided for movement along the elongate guiding element; and a second magnet guided for movement along the elongate guiding element and positioned in respect of the first magnet, so that the first and second magnets repulse one another and the guiding element limits and guides the movement of the first and second magnets in respect to one another.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: December 15, 2009
    Assignee: Hunter Douglas Industries BV
    Inventors: Franciscus Cornelis Gerardus Lamers, Jan Pieter Wetsema, Hans de Lange