Patents by Inventor Frederick Ditchburn

Frederick Ditchburn 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).

  • Periodontal probes
    Patent number: 4501555
    Abstract: A periodontal probe (3) comprises an elongate shaft terminating in a measuring tine (4) having a plurality of spaced transverse grooves (5) formed therein, the probe being formed of a material translucent to light. In use, the probe is mounted in a handle provided with a source of light (6) to direct light along the length of the probe whereby the grooves formed in the tine appear as comparatively brightly illuminated marks.
    Type: Grant
    Filed: February 2, 1984
    Date of Patent: February 26, 1985
    Assignee: Dentsply Research & Development Corp.
    Inventor: Frederick Ditchburn