Patents by Inventor Walter G. Johnston

Walter G. Johnston 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).

  • Artist's hand and brush guide for adjustable traveling mahl
    Patent number: 5193772
    Abstract: A hand and brush guide manipulated the length of a mahl in the form of a beam adjusted as to height over a base supporting an artist's canvas, carriages at opposite sides of the base carrying the mahl in spaced relation over the base and supported canvas, the guide slidably carried on the mahl by antifriction bearings and positioned by a brake for steadying the artist's hand and brush, with adjustment for said spaced relation of the mahl and guide from the canvas and with braking to position them between top and bottom positions over the canvas.
    Type: Grant
    Filed: January 1, 1992
    Date of Patent: March 16, 1993
    Inventor: Walter G. Johnston
  • Adjustable traveling mahl and magnetic support for mounting artist's canvases
    Patent number: 4717109
    Abstract: A mahl in the form of a beam adjusted as to height over a base for support of an artist's canvas, with carriages at opposite sides of the base to carry the mahl in spaced relation over the base and supported canvas, with adjustment for said spaced relation, with braking to position the mahl between top and bottom ends of the base, and with a protractor turntable for universal disposition of the canvas with respect to the mahl.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: January 5, 1988
    Inventor: Walter G. Johnston