Granted Patent
Utility
US 5,328,335 · App. 08/109,888
Static efficiency enhancer for axial fans
Inventor:
Robert C. Monroe
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Aug 23, 1993
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.