Granted Patent
Utility
US 5,143,349 · App. 07/580,939
Valve with flow shield
Inventors:
Harald Korfgen, Heinz Hirsch, Vinzenz Grendel
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Sep 10, 1990
Inventors
Harald Korfgen
Heinz Hirsch
Vinzenz Grendel
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.