Patents by Inventor Antonius L. J. Hopstaken

Antonius L. J. Hopstaken 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).

  • Adjustable prosthesis
    Patent number: 4921499
    Abstract: A fixation element for securing a prosthesis in a bone, whereby the effective diameter of the fixation element can be increased by increasing the temperature of at least one element of a material which shrinks or expands when heated, such as shape memory metal, by means of an inductive magnetic field, whereby the change in shape generated with the shrinkage or expansion of the material is converted into an increase in diameter of the fixation element.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: May 1, 1990
    Assignee: Ordev B.V.
    Inventors: Erik L. Hoffman, Antonius L. J. Hopstaken