Patents by Inventor Stig-Ragnar J. Landsdorff

Stig-Ragnar J. Landsdorff 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).

  • Improvement in monococque containers
    Patent number: 4950122
    Abstract: A container of monococque construction having a peripheral wall comprised of concentric inner and outer walls, with the space between the walls being filled with a plastics material. At least one of the inner and outer walls is a spirally-wound tube having raised seams projecting into the space between the inner and outer walls. The container is particularly adapted to form the body of a waste compactor for use as a bulk container for both fluid and particulate materials.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: August 21, 1990
    Inventor: Stig-Ragnar J. Landsdorff