Granted Patent
Utility
US 4,971,518 · App. 07/337,739
Radial fan with integrated dust separator
Inventor:
Christian Florin
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Apr 13, 1989
Inventor
Christian Florin
Assignee (at issue)
Asea Brown Boveri, S.A.
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.