Granted Patent
Utility
US 6,189,693 · App. 09/236,794
Electric toothbrush
Inventors:
Lawrence A. Blaustein, John Osher, John R. Nottingham, John W. Spirk
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Jan 25, 1999
Inventors
Lawrence A. Blaustein
John Osher
John R. Nottingham
John W. Spirk
Assignee (at issue)
DR. JOHNS PRODUCTS, Ltd.
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.