Patents by Inventor Graham E. Roberts

Graham E. Roberts 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).

  • Take-off safety indicator for aircraft
    Patent number: 4284029
    Abstract: A take-off safety indicator for an aircraft has a double movement meter with a crossover pointer indication. The meter movements are driven respectively by inputs representative of speed and distance along the runway. The crossover point follows a locus and the optimum locus is shown on a background card selectable from a number of cards in dependence upon prevailing conditions.
    Type: Grant
    Filed: October 2, 1979
    Date of Patent: August 18, 1981
    Inventor: Graham E. Roberts