Patents by Inventor Thomas Hassell

Thomas Hassell 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).

  • Brushhead for use in an acoustic toothbrush
    Patent number: 6202241
    Abstract: A brushhead for an acoustic powered toothbrush having a particular bristle configuration which includes a plurality of bristle portions arranged in four columns and eight rows, wherein the distal end two adjacent rows and the proximal end two adjacent rows both have longer bristles than the remaining bristle portions except for an intermediate row of bristle portions which are slightly longer than the longer bristle portions. The distal, intermediate and proximal bristle portions all have pointed bristle portion tips.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: March 20, 2001
    Assignee: Optiva Corporation
    Inventors: Thomas Hassell, Stephen M. Meginness, III, James C. McInnes