Granted Patent
Utility
US 4,943,209 · App. 07/464,561
Hub for a plastic blower impeller
Inventor:
Richard F. Beehler
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Jan 16, 1989
Inventor
Richard F. Beehler
Assignee (at issue)
Heil-Quaker Corporation
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.