Granted Patent
Utility
US 5,603,128 · App. 08/477,932
Dual-flush control apparatus
Inventor:
David Nichols-Roy
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Jun 7, 1995
Inventor
David Nichols-Roy
Assignee (at issue)
Hunter Plumbing Products
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.