Granted Patent
Utility
US 5,652,990 · App. 08/338,479
Brush section for an electric toothbrush
Inventors:
Georges Driesen, Peter Hilfinger
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Nov 15, 1994
Inventors
Georges Driesen
Peter Hilfinger
Assignee (at issue)
The Braun Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.