Patents by Inventor Leonard Lee Spiegel

Leonard Lee Spiegel 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).

  • Vehicle airflow control device
    Patent number: 4116482
    Abstract: A device attachable to either end of a vehicle is extendible while the vehicle is underway to effect streamlining at either or both ends of the vehicle.
    Type: Grant
    Filed: April 13, 1977
    Date of Patent: September 26, 1978
    Inventor: Leonard Lee Spiegel