Granted Patent
Utility
US 5,785,846 · App. 07/835,525
Venturi-powered filtration system for pools
Inventors:
Steven R. Barnes, Lester R. Mathews
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Feb 14, 1992
Inventors
Steven R. Barnes
Lester R. Mathews
Assignee (at issue)
Caretaker Systems, Inc.
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.