Granted Patent
Utility
US 5,974,618 · App. 09/017,686
Interdental cleaning device
Inventor:
Norbert Dumler
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Feb 3, 1998
Inventor
Norbert Dumler
Assignee (at issue)
georg karl geka-brush GmbH
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.