Granted Patent
Utility
US 4,423,840 · App. 06/241,620
Rotary atomizer bell
Inventor:
Kenneth J. Coeling
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Mar 9, 1981
Inventor
Kenneth J. Coeling
Assignee (at issue)
Champion Spark Plug Company
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.