Granted Patent
Utility
US 6,810,620 · App. 10/305,491
Adjustable height shutter
Inventors:
Richard N. Anderson, Donald E. Fraser
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Nov 27, 2002
Inventors
Richard N. Anderson
Donald E. Fraser
Assignee (at issue)
Hunter Douglas 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.