Granted Patent
Utility
US 4,592,305 · App. 06/786,346
Variable low-pressure fluid color change cycle
Inventor:
James A. Scharfenberger
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Oct 9, 1985
Inventor
James A. Scharfenberger
Assignee (at issue)
Ransburg 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.