Granted Patent
Utility
US 6,289,918 · App. 09/327,913
Automatic locking bypass valve for liquid suction systems
Inventors:
Dieter J. Rief, Hans Raines Schlitzer
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Jun 8, 1999
Inventors
Dieter J. Rief
Hans Raines Schlitzer
Assignee (at issue)
POOLVERGNUEGEN
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.