IP Library Granted Patent US 5,309,591
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.

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Quick Facts
Patent No.
US 5,309,591
App. No.
08/004,467
Filed
1993-01-14
Granted
1994-05-10
Kind
A