Patents by Inventor Clarence W. Hannan

Clarence W. Hannan 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).

  • Orthodontic debonding method and tool
    Patent number: 4904183
    Abstract: Debonding of cemented orthodontic brackets from teeth by application of a quick twisting force to fracture the adhesive bond. A torquing tool has slotted ends making a close slip fit over mesial and distal side surfaces of the bracket, and has a flattened center section providing a good tactile sense of applied force. The method and tool are especially useful with brackets made of brittle ceramic material.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: February 27, 1990
    Assignee: Unitek Corporation
    Inventors: Clarence W. Hannan, Wilford A. Snead, Jirina V. Pospisil, Robert P. Eckert
  • Orthodontic debonding tool
    Patent number: D306207
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: February 20, 1990
    Assignee: Unitek Corporation
    Inventors: Clarence W. Hannan, Wilford A. Snead