Granted Patent
Utility
US 4,394,965 · App. 06/264,563
Pulsating shower using a swirl chamber
Inventors:
Wolfgang Backe, Wolf-Dieter Goedecke, Reinhard Schwenzer
Patented Case
View Patent ↗
Granted: Jul 26, 1983
Filed: May 18, 1981
Inventors
Wolfgang Backe
Wolf-Dieter Goedecke
Reinhard Schwenzer
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.