Patents by Inventor Curtis L. Marquardt

Curtis L. Marquardt 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).

  • Patent number: 5474313
    Abstract: An L-shaped extender for a hand truck including a support brace and an extension member extending transversely therefrom, the L-shaped extender provided with a pivotal connection for connecting the vertical support brace to the axle of a hand truck. The extender is configured to position the extension member to a folded position behind the side supporting surface of the hand truck and alternatively to a carrying position with the extension member supported on the blade of the hand truck. The extension member is tapered to a thin forward edge for maneuvering the forward edge of the extender under a load.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: December 12, 1995
    Inventor: Curtis L. Marquardt