Granted Patent
Utility
US 5,609,174 · App. 08/514,676
Sealed wash arm bearing
Inventor:
Mark A. Ferguson
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Aug 14, 1995
Inventor
Mark A. Ferguson
Assignee (at issue)
ECOLAB 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.