Patents by Inventor Chadwick C. Blackwell

Chadwick C. Blackwell 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).

  • Multi-scene sash frame
    Patent number: 5568831
    Abstract: A moveable, hangable sash frame for the convenient display of changeable scenes. The changeable scenes include a removable stationary primary scene and a removable secondary scene on a roller, which allows for rapid change of viewing from one scene to another scene. Either one, or both scenes can be quickly and easily removed and replaced with a different scene(s).
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: October 29, 1996
    Inventor: Chadwick C. Blackwell