Granted Patent
Utility
US 4,448,535 · App. 06/330,949
Apparatus for blending additives into a liquid
Inventor:
Joe E. West
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Dec 15, 1981
Inventor
Joe E. West
Assignee (at issue)
Western Company of North America
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.