Patents by Inventor Delmar D. Berckhan

Delmar D. Berckhan 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).

  • Turret toy vehicle
    Patent number: 4173840
    Abstract: A toy fire engine is disclosed including a body, wheel and axle assembly, aerial ladder, ladder support and loose ladder. The ladder support may include a turret for pivotal support of the ladder about a vertical axis. The fire engine body may include a ladder carrier which limits sideward movement and linear movement of a loose ladder when disposed in the carrier.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: November 13, 1979
    Assignee: Tonka Corporation
    Inventors: Curtis H. Fahrendorf, Delmar D. Berckhan