Patents by Inventor Robert N. Macmillan

Robert N. Macmillan 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).

  • System and apparatus for storage of wheeled trailer frames in horizontal stacks
    Patent number: 4952118
    Abstract: A storage system for wheeled trailer frames includes a staircase-like support rack. Frames are stacked horizontally with their front ends supported by the rack and with their rear wheels nested. Trailer frames are lifted and stacked by means of a traveling overhead yard crane provided with a lifting attachment or by means of a forklift truck provided with a lifting attachment slidingly engaged by its tines.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: August 28, 1990
    Assignee: RNMAC Services Inc.
    Inventor: Robert N. Macmillan