Patents by Inventor William K. Aitken

William K. Aitken 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).

  • Concrete slab structure for railway track
    Patent number: 4262845
    Abstract: A concrete slab structure for supporting railway track is itself resiliently supported on a base structure by a spring system comprising tubes secured against longitudinal movement in holes extending through the slab from its top surface to its bottom surface, springs each arranged in a respective one of the tubes and an adjustable spring abutment at the upper end of each of the tubes for pre-loading the springs against the base structure.
    Type: Grant
    Filed: March 21, 1979
    Date of Patent: April 21, 1981
    Assignee: British Railways Board
    Inventors: John C. Lucas, William K. Aitken