Granted Patent
Utility
US 5,511,273 · App. 08/517,791
Variable engagement toothbrush
Inventor:
David T. Carroll
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Aug 22, 1995
Inventor
David T. Carroll
Assignee (at issue)
Preventive Dental Specialties, Inc.
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.