Granted Patent
Utility
US 4,767,052 · App. 07/040,177
Thermostatically self-regulating mixing valve
Inventors:
Jan R. Kostorz, Dieter Kahle
Patented Case
View Patent ↗
Granted: Aug 30, 1988
Filed: Apr 17, 1987
Inventors
Jan R. Kostorz
Dieter Kahle
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.