Granted Patent
Utility
US 6,317,899 · App. 09/640,640
Dual flush toilet
Inventor:
Kirk S. Brewer
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Aug 17, 2000
Inventor
Kirk S. Brewer
Assignee (at issue)
Niagara Conservation Corp.
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.