Granted Patent
Utility
US 6,131,227 · App. 09/316,846
Suction regulating skirt for automated swimming pool cleaner heads
Inventors:
Dieter J. Rief, Hans Raines Schlitzer
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: May 21, 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.