Granted Patent
Utility
US 4,576,549 · App. 06/470,398
Vortex generator for centrifugal fans
Inventor:
Robert Lanier
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Feb 28, 1983
Inventor
Robert Lanier
Assignee (at issue)
Garden City Fan & Blower Co.
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.