Patents by Inventor Hans-Ruedi Hefti

Hans-Ruedi Hefti 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).

  • Retraction Thread With Improved Absorbency
    Publication number: 20080286719
    Abstract: The invention relates to a retraction thread, especially a dental retraction thread for use in dentistry, that is distinguished by the fact that it has yarns produced by an air vortex process.
    Type: Application
    Filed: July 1, 2005
    Publication date: November 20, 2008
    Applicant: COLTENE/WHALEDENT GMBH+CO.KG
    Inventors: Barbara Muller, Hans-Ruedi Hefti, Stephan Lampl