Granted Patent
Utility
US 5,709,233 · App. 08/354,597
Dental cleansing implement
Inventors:
Bernhard Boland, Werner Haczek
Patented Case
View Patent ↗
Granted: Jan 20, 1998
Filed: Dec 13, 1994
Inventors
Bernhard Boland
Werner Haczek
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.