Granted Patent
Utility
US 5,020,530 · App. 07/519,912
Inhalation therapy device
Inventor:
Warren C. Miller
Patented Case
View Patent ↗
Granted: Jun 4, 1991
Filed: May 7, 1990
Inventor
Warren C. Miller
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.