Granted Patent
Utility
US 4,258,444 · App. 06/037,413
Bath water level control system
Inventor:
Willy Orszullok
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: May 9, 1979
Inventor
Willy Orszullok
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.