Granted Patent
Utility
US 4,653,535 · App. 06/904,797
Single-lever sanitary water valve
Inventor:
Konrad Bergmann
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Sep 5, 1986
Inventor
Konrad Bergmann
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.