Patents by Inventor Jan O. Ringdal

Jan O. Ringdal 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).

  • Plastic body arrangement for small, light vehicles
    Patent number: 5286080
    Abstract: A method for the manufacture of plastic car bodies, preferably moulded or cast in one piece, with openings for doors and windows, includes the step of forming recesses from the outside to the inside terminating inside in an approximately right angle; at least one opening is cut out by means of a projection from a flange or angle K; moulding is then secured to envelop the plastic portion and is attached to an internal rollover bracket or frame; on one side of the door opening moulding is secured a door hinge.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: February 15, 1994
    Assignee: A. S. Ringdal Patenter
    Inventors: Jan O. Ringdal, Lars Ringdal