Granted Patent
Utility
US 6,823,923 · App. 10/102,194
Light-control window covering and method and apparatus for its manufacture
Inventors:
Roger Palmer, Warren Stephenson
Patented Case
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Granted: Nov 30, 2004
Filed: Mar 20, 2002
Inventors
Roger Palmer
Warren Stephenson
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.