Patents by Inventor George W. Comstock, Jr.

George W. Comstock, Jr. 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).

  • Black board line marking device
    Patent number: 4174573
    Abstract: A desired marker such as a felt tip pen or a pencil or a chalk may be carried across a chalk board by mounting the marker on a clamp which is attached to an arm. The arm in turn can be mounted on a trolley which is movable on a frame. The frame can be attached to the chalk tray by wheels and a handle attached to the frame. The marker can be moved across the chalk board by moving the arm mounted on the trolley with respect to the general position of the frame. The frame can be moved using the wheels underneath the frame and the handle attached to the frame.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: November 20, 1979
    Inventor: George W. Comstock, Jr.