Granted Patent
Utility
US 6,203,423 · App. 09/371,287
Damper flap and duct connector assembly
Inventors:
Gary J. Craw, Daniel L. Karst
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Aug 10, 1999
Inventors
Gary J. Craw
Daniel L. Karst
Assignee (at issue)
Broan Manufacturing Company, 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.