Patents by Inventor Arnoldus J. Borst

Arnoldus J. Borst 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).

  • Dental cavity measuring instrument
    Patent number: 4445857
    Abstract: An instrument for measuring the depth of a periodontal pocket cavity including a probe needle, a needle holder and a handle, has a hinge construction whereby the needle with the needle holder is pivotable relative to the handle against the action of a bias spring which has a flat spring characteristic within the restricted pivoting range of the hinge.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: May 1, 1984
    Assignee: Stichting Kennisexploitatie Nederland
    Inventor: Arnoldus J. Borst