Granted Patent
Utility
US 4,846,207 · App. 07/220,770
Connecting fitting for a mixing valve and process for connecting the valve
Inventors:
Jurgen Humpert, Jan R. Kostorz
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Jul 18, 1988
Inventors
Jurgen Humpert
Jan R. Kostorz
Assignee (at issue)
Friedrich Grohe Armaturenfabrik GmbH & 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.