Patents by Inventor Graham A. W. Armstrong

Graham A. W. Armstrong 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).

  • Escalator cleaning device
    Patent number: 5025527
    Abstract: An escalator cleaning device is disclosd having a brush adapted to cover the tread of an escalator and a frame for supporting the brush. The cleaning device is further constructed so that the frame can engage the side walls of an escaltor in order to support the cleaning device in place during use.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: June 25, 1991
    Assignee: Advanced Escalator and Travelator Cleaner Pty. Ltd.
    Inventor: Graham A. W. Armstrong