Patents by Inventor William Hall McKinlay

William Hall McKinlay 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).

  • Apparatus for signalling the position of a point on a surface
    Patent number: 4022969
    Abstract: Apparatus for signalling the position of a point on a surface divided into a plurality of identical subsidiary areas includes primary transducer means operable to identify uniquely the subsidiary area in which the point is located, and secondary transducer means representing the sub-divisions of a single subsidiary area. The primary and secondary transducer means may each be represented by a rectangular matrix of light-emitting devices which may be scanned sequentially by scanning means.
    Type: Grant
    Filed: September 23, 1975
    Date of Patent: May 10, 1977
    Assignee: Ferranti, Limited
    Inventors: William Hall McKinlay, Robert Allan Reid Tait