Patents by Inventor Heinrich G. Hengstermann

Heinrich G. Hengstermann 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).

  • Plant carrier
    Patent number: 5309673
    Abstract: A plant carrier for cultivating plants, seedlings, seeds, or the like, has at least one layer of plant-growing material, an upper layer of natural fiber, and a lower layer of natural fiber sandwiching the plant growth layer in between, and thread means for stitching and sewing the upper and lower natural fibers layers together is improved by natural fiber layer means combining the upper and lower fiber layers along at least portions of their edges to produce a hose-like cover that is filled with said plant layer of plant growing material.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: May 10, 1994
    Assignees: Blumen. Stender, MST Dranbedarf GmbH
    Inventors: Hermann Stover, Alfons Meyer, Hans Stender, Heinrich G. Hengstermann