Granted Patent
Utility
US 6,270,401 · App. 09/585,995
Air diffuser with unitary valve assembly
Inventor:
David Wormmeester
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Jun 2, 2000
Inventor
David Wormmeester
Assignee (at issue)
HART & COOLEY, INC.
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.