Granted Patent
Utility
US 6,234,236 · App. 09/497,849
Cordless balanced window covering
Inventor:
Otto Kuhar
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Feb 4, 2000
Inventor
Otto Kuhar
Assignee (at issue)
Newell Operating Co.
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.