Patents by Inventor Rodney C. Demers

Rodney C. Demers 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).

  • Magnetic window cleaning apparatus
    Patent number: 4977637
    Abstract: Inside and outside window surface cleaning units contain magnets disposed adjacent to respective base walls. All magnets of the inside unit have the same polarity surfaces adjacent to the base wall. All magnets of the outside unit have all magnets with the opposite polarity adjacent to the base wall so that lateral displacement of the inner and outer units does not cause magnetic repulsion, but rather sustains attraction. A separate outside squeegee unit is provided also having magnets of the opposite polarity adjacent to the base wall.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: December 18, 1990
    Inventor: Rodney C. Demers