Patents by Inventor Sylvain Langlais

Sylvain Langlais 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).

  • Adjustable legs for desk and the like
    Patent number: 5107775
    Abstract: A school desk has legs adapted to be lengthened for raising the desk. The legs are provided with a sleeve adapted to fittingly slide on the legs. The legs have a transversal perforation, and the sleeves have a set of vertically disposed holes. A screw and nut combination is used to lock the sleeves on the legs at selected vertical positions. The sleeves are vertically grooved to facilitate their sliding action and to allow the screw and nut combination to positively lock the sleeves on the legs.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: April 28, 1992
    Inventors: Sylvain Langlais, Robert Cusson