Patents by Inventor Erik Franois de Mul

Erik Franois de Mul 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).

  • Patent number: 4035918
    Abstract: A dental instrument for pressing down fillings of amalgam or a different tooth filling material, comprising a head with a through-bore, impact means for axial reciprocal movement in the bore, a handle, the main direction of which includes an angle with the impact direction, and at least one additional head with through-bore and appurtenant impact means adapted to reciprocate axially in the bore of said additional head, the impact direction of each additional impact means including an angle with both the main direction of the handle and with the impact direction of the first impact means, while the impact surfaces of said impact means differ in size, shape, position, etc.
    Type: Grant
    Filed: December 23, 1975
    Date of Patent: July 19, 1977
    Inventor: Erik Franois de Mul