Patents by Inventor Wolfgang U. Wiedemann

Wolfgang U. Wiedemann 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).

  • Patent number: 5448792
    Abstract: A tooth-brush is provided which has a brush shank (4) adapted to be driven electrically by a drive (2) and provided with a brush-head (5) having bristles (6), which brush-head performs movement (8), for example, a loosening movement whose frequency is higher than 30 Hz and whose amplitude is between 0.1 mm and 5 mm, which brush-head performs an additional movement (9), for example, a wiping movement having a frequency of between 1 Hz and 5 Hz. The combination of a rapid loosening movement and a slow wiping movement ensures that the teeth are cleaned in a thorough but gentle manner.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: September 12, 1995
    Assignee: U.S. Philips Corporation
    Inventors: Wolfgang U. Wiedemann, Piet C. J. Van Rens, Norbert Schneider