Patents by Inventor Donald E. McMullen

Donald E. McMullen 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).

  • Side loading and unloading trailer
    Patent number: 4242031
    Abstract: An apparatus is disclosed for side loading and unloading large objects such as cylindrical fuel tanks from flat bed trailers. Double pivoted links in combination with a bent lever permits lateral loading and unloading from a plane below the level of the trailer bed.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: December 30, 1980
    Inventor: Donald E. McMullen