Granted Patent
Utility
US 5,921,251 · App. 08/908,542
Brush that delivers beneficial agents
Inventor:
Ashok V. Joshi
Patented Case
View Patent ↗
Granted: Jul 13, 1999
Filed: Aug 7, 1997
Inventor
Ashok V. Joshi
Assignee (at issue)
Ceramatec, 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.