Granted Patent
Utility
US 5,289,604 · App. 07/855,707
Electric toothbrush with demountable brush section
Inventor:
Gerhard Kressner
Patented Case
View Patent ↗
Granted: Mar 1, 1994
Filed: May 5, 1992
Inventor
Gerhard Kressner
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.