Granted Patent
Utility
US 6,440,247 · App. 09/742,640
Light control window covering and method of making same
Inventors:
John D. Rupel, Ren Judkins
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Dec 21, 2000
Inventors
John D. Rupel
Ren Judkins
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.