Granted Patent
Utility
US 5,309,591 · App. 08/004,467
Electric toothbrush with push-on protective cover
Inventors:
Walter Hagele, Peter Hartwein
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: Jan 14, 1993
Inventors
Walter Hagele
Peter Hartwein
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.