Granted Patent
Utility
US 6,622,433 · App. 09/954,541
Prefinished medium density fiberboard shutter
Inventor:
David Blachley
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Sep 15, 2001
Inventor
David Blachley
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.