Granted Patent
Utility
US 6,221,338 · App. 08/633,814
Method of producing particles for use in dry powder inhalers
Inventor:
John Staniforth
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: May 29, 1996
Inventor
John Staniforth
Assignee (at issue)
Vettore, LLC
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.