Granted Patent
Utility
US 5,141,539 · App. 07/807,593
Smoke filtering apparatus
Inventor:
Mouloud Hiouani
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Dec 16, 1991
Inventor
Mouloud Hiouani
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.