Patents by Inventor Jakobus W. Lestraden

Jakobus W. Lestraden 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).

  • Ground heating system
    Patent number: 4314772
    Abstract: A ground heating system comprises a porous stabilization layer provided between a pipe system for supplying heat and a pipe system for supplying water to control the ground humidity. The stabilization layer functions as a water distributor and heat storage means.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: February 9, 1982
    Inventor: Jakobus W. Lestraden