Patents by Inventor Raymond D. Dona

Raymond D. Dona 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).

  • Signal device having adjustable coding indicators
    Patent number: 4166673
    Abstract: Signal device for providing machine-readable indicia on an object, the device allowing the form of the indicia to be deliberately changed, but not accidentally. Reflective indicating means are slidable in a series of parallel tracks. Magnetic attraction between the track and the indicating means cause the indicating means to engage detents in the track and remain in selected locations.
    Type: Grant
    Filed: January 17, 1978
    Date of Patent: September 4, 1979
    Assignee: Mekontrol, Inc.
    Inventor: Raymond D. Dona