Granted Patent
Utility
US 4,634,341 · App. 06/683,868
Axial flow fans
Inventor:
Robert C. Monroe
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Dec 20, 1984
Inventor
Robert C. Monroe
Assignee (at issue)
Hudson Products 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.