Patents by Inventor Carl E. Weinmann

Carl E. Weinmann 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).

  • Portable ramp
    Patent number: 3984891
    Abstract: A portable ramp includes a span to the ends of which are secured feet, such securement being by means of pivotal connections that enable the feet to be pivoted so as to accommodate various differences in heights between two surfaces, from one to the other of which there is to be a movement such as of a wheeled vehicle.
    Type: Grant
    Filed: November 12, 1974
    Date of Patent: October 12, 1976
    Assignee: Valley Craft Products, Inc.
    Inventor: Carl E. Weinmann