Granted Patent
Utility
US 6,050,818 · App. 08/760,580
Electrically powered dental cleansing apparatus
Inventors:
Bernhard Boland, Werner Haczek
Patented Case
View Patent ↗
Granted: Apr 18, 2000
Filed: Dec 4, 1996
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.