Granted Patent
Utility
US 6,728,975 · App. 10/232,878
High performance flush valve assembly
Inventor:
Joseph Han
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Aug 30, 2002
Inventor
Joseph Han
Assignee (at issue)
American Standard 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.