Patents by Inventor Eckart v. Estorff

Eckart v. Estorff 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).

  • Leaf spring
    Patent number: 4022449
    Abstract: A leaf spring formed of a stack of spring leaves which are connected only at the spring ends and the spring middle, is provided at each spring end with a device which presses together several spring leaves with a preset, constant and load-independent force normal to the large faces of the spring leaves.
    Type: Grant
    Filed: April 26, 1974
    Date of Patent: May 10, 1977
    Assignee: Stahlwerke Bruninghaus GmbH
    Inventor: Eckart v. Estorff