Granted Patent
Utility
US 6,779,978 · App. 10/296,646
Blade for axial flow fan
Inventor:
Odilon Antônio Camargo Do Amarante
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Nov 26, 2002
Inventor
Odilon Antônio Camargo Do Amarante
Assignee (at issue)
Tecsis Tecnologia E Sistemas Avançados 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.