Granted Patent
Utility
US 4,948,047 · App. 07/231,759
Air freshener with microporous membrane
Inventor:
Anthony R. Zembrodt
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Aug 12, 1988
Inventor
Anthony R. Zembrodt
Assignee (at issue)
The Drackett Company
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.