Granted Patent
Utility
US 5,591,017 · App. 08/317,174
Motorized impeller assembly
Inventor:
Mark K. Dwyer
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Oct 3, 1994
Inventor
Mark K. Dwyer
Assignee (at issue)
Ametek, 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.