Granted Patent
Utility
US 6,596,161 · App. 10/223,166
Laminated microporous diffuser
Inventor:
William B. Kerfoot
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Aug 19, 2002
Inventor
William B. Kerfoot
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.