Patents by Inventor PETER JOHN CUNNINGHAM

PETER JOHN CUNNINGHAM 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).

  • LIGHT FILTER FOR DENTAL USE
    Publication number: 20010021073
    Abstract: A light filter for dental use having: a transparent planar member (20) coloured so as to filter-out visible radiation in the range of 400 nm to 520 nm, the range being that to which dental light-cured materials are sensitive; a base (22) of a magnetic material attached to the underside of the planar member (20); and an attachment device (36) having a shell (34) of a magnetic material containing a permanent magnet (30), the attachment device (36) being attached to the lens (16).
    Type: Application
    Filed: February 26, 1999
    Publication date: September 13, 2001
    Inventors: RAYMOND ABRAHAM LEGGO, PETER JOHN CUNNINGHAM