Granted Patent
Utility
US 6,203,419 · App. 09/413,350
Air return bulkhead
Inventor:
Gregory L. Onken
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Oct 6, 1999
Inventor
Gregory L. Onken
Assignee (at issue)
John Donovan Enterprises-Florida, 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.