Patents by Inventor Teodor E. Constantinescu

Teodor E. Constantinescu 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).

  • Single multi-function handpiece for dental instruments
    Patent number: 4820152
    Abstract: A single handpiece that can be used in multiple dental treatments is provided. The handpiece comprises a housing having a coil for producing an electromagnetic or electrostrictive field in the housing, and a number of inserts that react with the electromagnetic or electrostrictive field and can be used with the housing to complete the handpiece. A switching system used with the handpiece, which electrically recognizes the particular insert used with the housing provide for automatically controlling circuitry that determines which of a number of materials and medicaments are to be delivered to the handpiece for use with a particular insert. Circuitry which provides better control of the ultrasonic insert in the handpiece is also provided.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: April 11, 1989
    Assignee: Dentsply Research & Development Corp.
    Inventors: George E. Warrin, Rene J. Perdreaux, Richard H. Paschke, Teodor E. Constantinescu, Robert McGill