Granted Patent
Utility
US 4,468,130 · App. 06/318,170
Mixing apparatus
Inventor:
Ronald J. Weetman
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Nov 4, 1981
Inventor
Ronald J. Weetman
Assignee (at issue)
Federal Signal Corporation
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.