Patents by Inventor Rodney H. Ashforth

Rodney H. Ashforth 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).

  • Indicating instruments
    Patent number: 4155256
    Abstract: An indicating instrument particularly for use in a vehicle comprises a first element which is moved behind a window of the instrument such that the amount of the first element visible in the window is indicative of the distance travelled by the vehicle, and a second element that is moved in dependence upon the speed of the vehicle and such that the second element is obscured from view in the window by the first element while a predetermined relationship exists between the speed and distance.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: May 22, 1979
    Assignee: Smiths Industries Limited
    Inventor: Rodney H. Ashforth