Granted Patent
Utility
US 5,221,230 · App. 07/609,166
Paint spraying booth with split-flow ventilation
Inventors:
Charles H. Darvin, Jacqueline Ayer
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Nov 1, 1990
Inventors
Charles H. Darvin
Jacqueline Ayer
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.