Patents Assigned to Stichting Kennisexploitatie Nederland
  • 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