Patents by Inventor Frederick D. Hartmann

Frederick D. Hartmann 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).

  • Baby cradle
    Patent number: 4392261
    Abstract: A baby cradle supported on a pair of longitudinal rockers providing for head to toe rocking of a baby. When the cradle is not being rocked, as in an equilibrium position, the rockers maintain the cradle in such a position that a baby lying in the cradle is at all times head up relative to the feet.
    Type: Grant
    Filed: December 16, 1980
    Date of Patent: July 12, 1983
    Assignee: Loretta C. Ivory
    Inventors: Loretta C. Ivory, Frederick D. Hartmann