Granted Patent
Utility
US 5,983,939 · App. 08/880,087
Single-control mixing valve
Inventors:
Bruno Heimann, Bernd Bischoff, Kerstin Keiter
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Jun 20, 1997
Inventors
Bruno Heimann
Bernd Bischoff
Kerstin Keiter
Assignee (at issue)
Friedrich Grohe AG
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.