Patents by Inventor Klaas Jetze Hoekstra

Klaas Jetze Hoekstra 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 supporting solar panel and a solar panel assembly comprising this device
    Patent number: 6105316
    Abstract: The present invention relates to a device for supporting one or more solar panels or thermal collectors which may be arrangeable on a flat roof. The device has a bottom wall, a rear wall which extends upwardly from a rear side of the bottom wall, and two oppositely arranged side walls which are integrally joined with side edges of the bottom wall and rear wall. The side walls slope from the rear wall to a front edge of the bottom wall.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: August 22, 2000
    Assignee: Cooperatief Advies en Onderzoeksburo u.a. Ecofys
    Inventors: Willem Otto Julius Bottger, Antonius Bernardus Schaap, Klaas Jetze Hoekstra, Antonius Joseph Nicolaas Schoen