Patents by Inventor Herman van der Vaart

Herman van der Vaart 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).

  • Light fixture and louver construction
    Patent number: 4849867
    Abstract: A light fixture including a louver assembled from blades formed of thin metal strips. The blades each have separate parabolic lower sidewalls and upper sidewalls. The parabolic upper sidewalls terminate in edge strips which overlap to close the blades when the blades are nested to form the louver. Nesting of the blades forces the sidewalls together against a resilient bias, the bias tending to rigidify the louver after assembly.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: July 18, 1989
    Assignee: Litecell, Inc.
    Inventors: Walter Glass, Herman van der Vaart